Arizona State’s Matthew Mayich Collapse: What the Preliminary Report Reveals — and What It Doesn’t

Table of Contents

1. Key Highlights
2. Introduction
3. How the workout unfolded, according to Arizona State’s timeline
4. Where the report falls short: criticism from the family and legal counsel
5. Exertional heat stroke: why it becomes deadly so quickly
6. The role of pre‑participation exams and why they don’t guarantee safety
7. Outside instructors and the chain of command: where oversight broke down
8. Culture and messaging: “too soft” and the pressure to perform
9. How timely treatment changes outcomes: a narrow window
10. Lessons from prior high‑profile cases
11. Institutional accountability: what effective reviews should produce
12. The legal landscape: civil liability and criminal investigations
13. Prevention: concrete best practices for heat‑safety in athletics
14. What a credible corrective response looks like
15. The athlete and family perspective: trust, transparency and recovery
16. Why internal reviews often prompt calls for outside investigation
17. Broader implications for collegiate athletics
18. Where the investigation should go from here
19. What athletes, coaches and administrators should take away
20. Comparing institutional reactions: reform vs. deflection
21. The human cost and the path forward
22. FAQ

Key Highlights

• Arizona State’s initial review finds procedural gaps around an off-campus, military-style workout that preceded Sun Devils forward Matthew Mayich’s exertional heat stroke, but assigns no direct blame and recommends forming an advisory panel to revise policies.
• Family lawyers and safety experts criticize the report for failing to identify accountability, for allowing a non‑university instructor to run an intense session without formal oversight, and for revealing lapses that mirror previous heat‑illness tragedies in sport.

Introduction

Matthew Mayich, a 21‑year‑old forward for Arizona State University’s hockey team and a 2023 St. Louis Blues draftee, remains the center of a probe that has raised urgent questions about athlete safety, institutional oversight, and the line between team building and dangerous exertion. Mayich collapsed after a three‑day series of outdoor training exercises described by multiple sources as “military‑style.” He suffered exertional heat stroke that deprived his brain of oxygen and led to a coma. Arizona State’s first public report on the incident outlines a timeline and identifies procedural shortcomings, but stops short of assigning responsibility. That omission has prompted sharp criticism from the player’s family and legal counsel and revived debate about how universities prevent, detect and respond to life‑threatening exertional heat illness.

The sequence of events, the university’s response, and the questions it leaves unanswered highlight systemic vulnerabilities: reliance on outside instructors without formal vetting, inconsistent adherence to workout and hydration protocols, and the limits of internal reviews. The case also underscores a simple medical truth: exertional heat stroke can become catastrophic within minutes, and delays or lapses in prevention and treatment increase the risk of permanent brain injury or death.

The initial report offers a base of facts. What it does not provide is the accountability many expect. This article synthesizes the available information, explains the medical and operational issues at play, compares the incident to prior institutional failures in sport, and sets out clear markers for what an effective investigation and corrective plan should include.

How the workout unfolded, according to Arizona State’s timeline

Arizona State’s initial review reconstructs the three‑day “team‑building” sessions that culminated with Mayich’s collapse. The sessions included sprints, planks, push‑ups, bear crawls and a run carrying a medicine ball. Players were required not only to complete exercises correctly but to repeat instructions and keep precise counts. Sources reported punitive measures for those who lagged—extra sprints or repetitions—and an atmosphere that discouraged complaint.

The exercises were conducted outdoors during rising temperatures in the Phoenix/Tempe area, reportedly in the mid‑to‑high 80s Fahrenheit. According to the university’s timeline, coach Greg Powers arranged for an ex‑Green Beret, Tim Ziesel, to speak with the team and run the exercises. Ziesel is not a university employee. The coaching staff sought permission for Ziesel to address players but did not submit his planned activities to athletic strength and conditioning staff for review. Ziesel did not have a contract for the sessions and left campus before the final exercise segment was completed.

Mayich had been cleared to participate through a standard physical exam prior to the workout. During the session he appeared disoriented, stumbled while carrying a medicine ball and eventually collapsed. A trainer applied iced towels and cool water, and Tempe Fire Medical Rescue was called to what the timeline described as a “serious heat emergency.” Mayich was hospitalized and diagnosed with exertional heat stroke that produced hypoxic brain injury.

Arizona State University Police opened an investigation. The university’s internal review, led by senior vice president James Rund, presented the timeline and proposed the creation of a “blue‑ribbon advisory panel” to recommend changes to outdoor training policies. The report did not identify specific individuals for blame or recommend disciplinary action.

Where the report falls short: criticism from the family and legal counsel

Rob Carey, the Mayich family’s lawyer, dismissed the initial report as insufficient and deflective. He objected to the university’s proposal to form an advisory committee to study policies instead of naming where the breakdowns occurred and holding people accountable. Carey’s objections pinpoint three related concerns:

• Policies exist but were not followed. Carey said the problem is not lack of policy but noncompliance. If existing rules were violated, a fact‑finding process should identify the actors responsible, not defer action to a future advisory group.
• Oversight failure for non‑university contractors. Ziesel, a former special forces member, led the session without a formal contract or documented review by strength and conditioning staff. That arrangement raises questions about who authorized the scope of the workouts and who ensured safety measures were in place.
• Concerns about the integrity of an internal review. Carey indicated skepticism that ASU’s internal process will produce an impartial account; he urged that the investigation be referred to external law enforcement (Phoenix PD) for an independent criminal probe.

Those criticisms resonate broadly with public expectations in cases where a student‑athlete suffers catastrophic injury: a desire for clear answers, visible accountability and steps that ensure the same failure cannot recur.

Exertional heat stroke: why it becomes deadly so quickly

Exertional heat stroke is a medical emergency characterized by an elevated core temperature—commonly above 104°F (40°C)—and central nervous system dysfunction. While the exact threshold can vary, the illness becomes life‑threatening when high temperatures and intense physical activity combine to overwhelm the body’s thermoregulatory mechanisms.

Several features make exertional heat stroke uniquely perilous in sports settings:

• Rapid onset: Symptoms can escalate from dizziness and disorientation to collapse in minutes.
• Brain vulnerability: Prolonged elevated core temperature and reduced oxygen delivery lead to hypoxic injury; even short delays in cooling and resuscitation increase the risk of permanent neurological damage.
• Treatability with a narrow effective window: Immediate whole‑body cold‑water immersion is the gold‑standard emergency treatment and is most effective within the first 30 minutes after collapse. Delays in initiating aggressive cooling correlate with worse outcomes.
• Environmental measurement limitations: Air temperature alone does not capture the true thermal stress. Wet‑Bulb Globe Temperature (WBGT) integrates heat, humidity, wind and solar load and correlates better with exertional heat‑illness risk.

The Mayich case illustrates how environmental stress, exertion intensity and reportedly punitive workout practices combine to create a dangerous profile. If cold‑water immersion and medical rescue are delayed or improvised, the window for preventing severe brain injury narrows quickly.

The role of pre‑participation exams and why they don’t guarantee safety

Mayich had passed a physical exam that cleared him for participation. Pre‑participation medical evaluations are necessary but insufficient safeguards. They identify chronic conditions that raise risk—cardiac abnormalities, sickle cell trait, certain metabolic disorders—but cannot predict an acute physiological response to extreme exertion in a given environment.

Three limits of pre‑participation screening stand out:

• They cannot foresee acute events triggered by excessive or atypical exertional loads.
• They rely on accurate self‑reporting and on tests that do not measure heat tolerance.
• They can give a false sense of security when other protective systems—workout design, hydration supervision, environmental monitoring—are absent or ignored.

In practice, safety requires an integrated approach: medical clearance, real‑time environmental assessment, appropriate workout programming, competent supervision and a robust emergency action plan.

Outside instructors and the chain of command: where oversight broke down

Arizona State’s timeline makes clear that the coaching staff requested permission for Ziesel to speak with players but did not submit his planned activities to strength and conditioning professionals. The instructor had no contract and left campus before the workout concluded.

This raises governance and liability questions that apply broadly to athletics programs:

• Approval vs. oversight. Permission for a guest speaker is not equivalent to approval of a full training regimen. Universities must have protocols that require submission and review of all planned physical activities by certified strength and conditioning staff or athletic trainers.
• Contractor credentialing. When programs hire outside instructors, institutions must verify credentials, document scope of work, require written contracts that specify safety responsibilities, and ensure the instructor’s methods align with sport‑specific best practices.
• Chain of command during workouts. Who decides when to stop activities if environmental conditions or athlete responses indicate danger? That authority must be explicit and vested in trained staff empowered to interrupt the session.

These structural issues affect liability exposure and, crucially, athlete safety. The absence of a contract and lack of a formal review by the strength and conditioning team point to systemic weaknesses that allowed an unvetted, high‑intensity session to proceed.

Culture and messaging: “too soft” and the pressure to perform

Public reporting indicates that coach Greg Powers had previously described the team as too “soft.” That culture of toughness can shape behavior in ways that increase risk: encouragement of pushing past subjective discomfort, punitive measures for perceived lagging, and an environment where athletes are discouraged from speaking up.

Culture matters in several ways:

• It informs workout design. Emphasis on toughness can prioritize intensity over safety, leading to workouts that exceed recommended exertional limits.
• It affects reporting. Athletes may underreport symptoms or avoid asking for rest for fear of seeming weak or losing playing time.
• It complicates post‑incident accountability. A culture that prizes toughness may normalize risky practices and resist external scrutiny.

Research and past incidents demonstrate the harm of cultures that valorize endurance at the expense of safety. Effective prevention requires leaders who prioritize athlete welfare and normalize stopping or modifying activities when indicators—environmental or physiological—dictate caution.

How timely treatment changes outcomes: a narrow window

Medical consensus emphasizes rapid cooling for exertional heat stroke, typically whole‑body cold‑water immersion, along with prompt transport when necessary. Key clinical points:

• Cooling first, then transport. If cold‑water immersion is available and safely administered, it should begin on site. Immersion can rapidly lower core temperature and reduce mortality and disability.
• Early recognition. CNS signs—confusion, collapse, seizures—are the most reliable indicators of exertional heat stroke and require immediate action.
• Coordinated emergency response. Athletic trainers, EMS and hospital teams must operate under a practiced emergency action plan with clear roles and communication.

Delay in initiating cold‑water immersion or in activating EMS can mean the difference between full recovery and long‑term neurological injury. The timeline notes iced towels and cool water applied by trainers and that Tempe Fire Medical Rescue was called after the workout; the report does not detail the timing of immersion or other advanced cooling measures. That gap contributes to public concern.

Lessons from prior high‑profile cases

Two past tragedies frame the stakes and potential institutional responses: Korey Stringer and Jordan McNair.

• Korey Stringer (Minnesota Vikings, 2001): Stringer died of exertional heat stroke during NFL training camp. His death prompted immediate revisions to NFL policies, including increased focus on environmental monitoring, hydration, acclimatization and emergency cooling capabilities at practice sites. The tragedy established the importance of having on‑site cold‑water immersion and clear procedures for high‑risk sessions.
• Jordan McNair (University of Maryland, 2018): McNair collapsed during a spring practice and later died. Investigations concluded that conditioning practices and lapses in medical treatment contributed to his death. The incident triggered internal and external inquiries, administrative changes and legal action. It also sharpened scrutiny on the role of coaching and the treatment of athletes during high‑intensity training.

Both examples show that high‑profile fatalities often produce policy change when investigations identify clear operational failures. They also reveal the limitations of internal reviews that fail to assign responsibility or push for meaningful reform. Families and the public often demand independent investigations when internal processes appear defensive or incomplete.

Institutional accountability: what effective reviews should produce

An effective review after a catastrophic event serves four purposes: establish an accurate factual record, identify systemic failures, hold individuals accountable where appropriate, and recommend corrective actions to prevent recurrence. Key elements include:

• Independent oversight. Ideally, a third‑party investigator—law firm, independent panel with medical and athletic safety experts or law enforcement—should supplement internal reviews to ensure impartiality.
• Detailed timeline and forensic medical analysis. Precise documentation of the environment, workout design, supervision, athlete responses, and timing of medical interventions is essential.
• Policy audit. A review must compare practice to written policies and determine whether policies were adequate and whether staff adhered to them.
• Personnel review and discipline. Where policy violations or negligence are identified, the review should recommend appropriate personnel actions or criminal referrals if warranted.
• Public transparency. Clear, timely disclosure of findings and remedial steps fosters trust and helps other programs learn.

Arizona State’s preliminary report provided a timeline and recommended forming a blue‑ribbon advisory panel. That proposal may be constructive for long‑term policy improvement, but it leaves unresolved whether any staff or processes failed in ways that warrant immediate corrective action or discipline.

The legal landscape: civil liability and criminal investigations

In cases of severe athlete injury or death, legal responses typically include civil lawsuits and, in some cases, criminal investigations. Civil claims often allege negligence against institutions, individual staff, or outside contractors. Key legal considerations:

• Duty of care. Universities owe a duty to reasonably protect student‑athletes from foreseeable harm arising out of participation in team activities.
• Breach of duty. Plaintiffs must show policy violations, poor supervision, lack of emergency preparedness, or other departures from acceptable standards.
• Causation and damages. Plaintiffs must connect the breach to the injury and quantify damages, including medical costs and long‑term care. In the Mayich case, hypoxic brain injury carries potentially substantial lifelong costs.
• Contractors and indemnity. When non‑university instructors participate, contractual terms, credentialing and oversight are central to allocating responsibility.

Criminal investigations are less common but can be pursued if evidence suggests reckless conduct, criminal negligence, or if mandated reporting rules were violated. The Mayich family’s counsel asked that the university’s police transfer the case to Phoenix PD, implying concern that an internal review may not be sufficiently independent. Whether law enforcement will pursue criminal charges depends on investigative findings and applicable state criminal statutes.

Prevention: concrete best practices for heat‑safety in athletics

Preventing exertional heat stroke requires layered measures. Institutions that have taken proven steps share several features:

• Environmental monitoring: Use WBGT or equivalent measurements rather than raw air temperature. Establish clear cutoffs and modify or cancel high‑intensity activity when readings exceed safe thresholds.
• Acclimatization programs: Gradually increase activity intensity and duration over one to two weeks, especially when athletes are new to hot conditions.
• Hydration and rest protocols: Schedule frequent water breaks, enforce rest intervals, and avoid punitive measures for missed reps due to heat stress.
• Supervision and credentialing: Ensure all physical training programs are designed or approved by certified strength and conditioning coaches and overseen by athletic trainers. Require contracts and scope-of-work documentation for outside instructors.
• Emergency planning and equipment: Site‑specific emergency action plans (EAPs), practiced regularly, with on‑site cold‑water immersion capability, trained staff who can administer immersion safely, and clear communication paths to EMS and hospitals.
• Education and culture change: Train coaches and athletes to recognize early signs of heat stress and to prioritize safety over perceived toughness.

Universities that adopt these measures reduce risk and are better positioned to defend their conduct in the event of an incident.

What a credible corrective response looks like

A responsible institutional response to a catastrophic event like this should produce immediate, medium‑term, and long‑term actions:

Immediate

• Independent forensic review of the incident and the medical treatment timeline.
• Temporary suspension or reassignment of staff under direct supervision of the session, pending investigation.
• Immediate audit of similar training activities across all sports programs to identify and halt risky practices.

Medium term

• Transparent publication of findings with sufficient detail to explain lapses and recommendations.
• Clear personnel decisions where policies were violated.
• Compulsory certification and contract standards for all external instructors.

Long term

• Mandatory environmental monitoring standards and written EAPs across all sports.
• Periodic audits and public reporting of compliance.
• Athlete welfare offices with whistleblower protections and direct reporting lines outside chain of command.

Arizona State’s proposal for a blue‑ribbon advisory panel could serve the medium‑ and long‑term objectives if it includes external experts and a mandate to implement binding reforms. The immediate need is accountability and clarity about what happened in the hours leading to Mayich’s collapse.

The athlete and family perspective: trust, transparency and recovery

For families, the urgent priorities extend beyond institutional reforms: they seek full disclosure, clear responsibility, and effective care for their loved one. The trauma of catastrophic brain injury brings substantial emotional and financial strain.

Key supports that institutions should provide to injured athletes and families include:

• Unambiguous communication about the athlete’s medical status and the care plan.
• Financial assistance for ongoing medical expenses, rehabilitation and, if necessary, long‑term care.
• Counseling and family support services.
• An independent liaison to ensure family concerns feed into the investigation and remedial processes.

The manner in which universities treat injured athletes and families influences public trust and the institution’s moral standing.

Why internal reviews often prompt calls for outside investigation

Internal reviews are necessary but often viewed skeptically when allegations of responsibility touch senior staff or institutional practices. Reasons for calling for outside inquiries include:

• Perceived conflicts of interest: Universities have reputations, budgets and personnel to protect, which can make objective internal investigation difficult.
• Expertise limitations: External forensic medical experts and independent legal teams can augment internal capacity and bring specialist rigor.
• Public confidence: An independent investigation increases credibility with families, public stakeholders and regulatory authorities.

The Mayich family’s counsel explicitly called for Phoenix PD involvement. Whether that request results in an external criminal inquiry depends on preliminary findings and prosecutorial discretion.

Broader implications for collegiate athletics

The Arizona State episode raises issues that extend across collegiate sports:

• The rise of external trainers in collegiate programs, fueled by donor influence or coaching preferences, creates oversight risks if institutions lack consistent contract management and credentialing.
• The tension between competitive advantage and athlete welfare persists, particularly in programs under pressure to win.
• Universities must reconcile decentralized athletic programming with centralized safety standards; gaps between coaching practices and athletic medical oversight create vulnerability.

Regulatory bodies, such as conference offices and the NCAA, can incentivize compliance by setting minimum safety standards and auditing member institutions. But meaningful change often depends on university leadership taking proactive steps to prioritize and enforce athlete safety.

Where the investigation should go from here

Key investigative questions that must be answered to restore confidence and prevent recurrence include:

• Who authorized Ziesel’s involvement and what did that authorization cover? Was a written scope of work required and, if so, why was none produced?
• Did strength and conditioning professionals and athletic trainers approve the specific training exercises? If not, why not?
• What was the timing of Mayich’s distress signals, the calls for medical assistance, and any cooling measures compared to accepted emergency timelines for exertional heat stroke?
• Were environmental conditions measured formally (WBGT) and, if so, what guidance did those measurements trigger?
• Were athletes who lagged behind systematically denied water breaks or otherwise penalized for reporting symptoms?
• What disciplinary or policy changes will be implemented immediately to prevent similar scenarios?

Transparent answers to these questions will be critical not only for the Mayich family but for the wider athletic community.

What athletes, coaches and administrators should take away

The Mayich case underscores several practical lessons for everyone involved in sport:

• No outside instructor should run high‑intensity workouts without documented approval from certified athletic staff and a written contract.
• Athletic trainers should have final authority to modify or stop activity if safety concerns arise.
• Environmental conditions must be measured and acted upon using standardized metrics like WBGT.
• A culture that prizes toughness over safety must be replaced by explicit expectations and protections for athletes who report symptoms.
• Emergency response capabilities—especially cold‑water immersion and rehearsed EAPs—save lives and reduce the risk of permanent injury.

Applying these measures reduces risk and stabilizes the chain of responsibility.

Comparing institutional reactions: reform vs. deflection

Institutions confronted with catastrophic events face a choice between two broad responses: substantive reform or defensive delay. Effective reform typically includes immediate corrective actions, transparent independent investigation, public reporting and visible policy change. Defensive delay often features internal reviews that avoid assigning responsibility, prolonged secrecy and reliance on future advisory groups to defer immediate action.

Arizona State’s initial report, while factual in parts, has been criticized for leaning toward the latter. The university’s decision to form a blue‑ribbon panel may be constructive long term, but it does not answer why a non‑university instructor led an intense outdoor session without formal review or why athletes who lagged were reportedly penalized.

Institutions that demonstrate accountability and rapid corrective measures reduce legal exposure, maintain public trust and most importantly, protect athletes.

The human cost and the path forward

At the center of procedural questions lie human consequences: a young athlete’s life altered by brain injury, a family seeking answers, teammates grappling with trauma. The appropriate institutional response must balance the need for careful investigation with swift action to prevent further harm.

For Arizona State and other programs, the path forward includes transparent, independent review; immediate audits and interim safety measures; clear disciplinary and contractual fixes; and a commitment to cultural change that places athlete welfare above rhetoric about toughness.

Heat‑related crises in sport have predictable, preventable elements. Where protocols are robust and followed, athletes thrive and recover; where oversight fails, the consequences can be irreversible. The Mayich case is a reminder that prevention requires constant attention—policy on paper, and procedures enforced in practice.

FAQ

Q: What caused Matthew Mayich’s collapse? A: Arizona State’s initial report indicates Mayich suffered exertional heat stroke during a three‑day outdoor, military‑style training session. The condition led to a lack of oxygen to his brain and subsequent coma. Exertional heat stroke results from intense exercise combined with environmental heat stress that overwhelms the body’s ability to regulate core temperature.

Q: Who led the workout and why is that significant? A: The sessions were led in part by Tim Ziesel, a former U.S. special forces member who is not a university employee and reportedly did not have a contract for the sessions. The significance lies in the lack of formal oversight: Ziesel’s activities were not submitted to the university’s strength and conditioning staff for review, which raises questions about credentialing, scope of authority and safety review.

Q: Did Arizona State find anyone responsible? A: The initial report outlines a timeline and identified procedural gaps but did not assign specific blame to individuals. It recommended forming a blue‑ribbon advisory panel to provide policy recommendations. That lack of assigned responsibility has been criticized by Mayich’s family and legal counsel.

Q: What are the key criticisms from Mayich’s family? A: The family’s lawyer, Rob Carey, criticized the report for failing to hold anyone accountable and for proposing an advisory panel instead of identifying policy violations and the individuals responsible. Carey claims existing policies were violated rather than absent, and he urged an independent criminal investigation by Phoenix PD.

Q: Was medical care delayed or inadequate? A: The timeline reports that trainers applied iced towels and cool water at the scene and called Tempe Fire Medical Rescue for a “serious heat emergency.” The report does not provide full detail on the timing of advanced cooling methods such as whole‑body cold‑water immersion, which medical experts consider critical in exertional heat stroke cases. The absence of a clear timeline for cooling and resuscitation fuels concern.

Q: What are best practices to prevent exertional heat stroke? A: Best practices include environmental monitoring with WBGT, staged acclimatization of athletes to heat, mandatory hydration and rest protocols, credentialing and approval of training programs by certified staff, on‑site emergency equipment such as cold‑water immersion tubs, regular emergency action plan rehearsals and a culture that empowers athletes to report symptoms without fear of penalty.

Q: Will there be legal consequences? A: Civil litigation is likely given the severity of the injury and the questions raised about oversight. Criminal investigations depend on independent findings and prosecutorial determination. The Mayich family’s legal counsel has asked for the case to be referred to Phoenix PD for an independent criminal probe.

Q: How have other incidents changed policy in sport? A: Past fatalities and severe injuries—such as the death of NFL player Korey Stringer and the death of Jordan McNair at the University of Maryland—have prompted policy changes, improved environmental monitoring, mandatory emergency response capabilities and greater scrutiny of conditioning programs. Those cases show that institutional accountability and reform often follow intense public scrutiny and litigation.

Q: What immediate steps should Arizona State take? A: Immediate steps should include an independent forensic review, a transparent timeline of events and medical interventions, suspension or reassignment of staff directly responsible for the session pending investigation, an audit of similar training practices across the athletic department, and provisional safety measures to prevent further risk while the review proceeds.

Q: What should athletes and families do if concerned about safety? A: Athletes and families should ask about environmental monitoring practices, emergency action plans, credentials of staff running physical training, access to athletic trainers, and the university’s procedures for reporting safety concerns. They should seek documentation of policies and, where appropriate, consult independent medical or legal counsel.

Q: Will forming a blue‑ribbon panel fix the problem? A: A suitably composed, independent advisory panel can contribute valuable recommendations for long‑term policy reform. However, forming a panel alone does not address immediate accountability issues or remedial actions. Panels help design better systems, but institutions must simultaneously implement immediate protective measures and, where warranted, take personnel actions to restore safety and trust.