Arizona State Hockey Player Matthew Mayich Collapses During Team Workout — Raising Questions About Training Oversight, Emergency Response, and Athlete Safety

Table of Contents

1. Key Highlights
2. Introduction
3. What happened: timeline and the university’s public response
4. Who is Matthew Mayich: background and implications for a young prospect
5. The workout, the contractor model, and questions about oversight
6. Medical possibilities: why healthy young athletes collapse
7. Emergency response and prognosis: how outcomes are determined
8. Legal and institutional responsibility: what investigations typically examine
9. Precedents: previous cases that changed policy and practice
10. Best practices colleges should follow — and what may be lacking here
11. The role of the coach and institutional culture
12. Third‑party contractors: unique liabilities and risk transfer
13. Mental health and team impacts: support beyond medical treatment
14. What investigators and the public are likely to seek
15. Potential legal pathways without presuming outcome
16. How similar cases led to policy change and what that suggests
17. What the program and stakeholders should do now
18. Broader implications for collegiate athletics
19. What to watch next
20. FAQ

Key Highlights

• Arizona State forward Matthew Mayich collapsed during an outdoor Aug. 20 team workout led by a contracted trainer; he remains in a coma and his family’s lawyer says he has "zero chance of recovery."
• The workout was led by an ex-Green Beret contractor at the request of ASU head coach Greg Powers; the family alleges the university has not conducted a proper investigation while the trainer's lawyer calls the session mid-level intensity.
• The case spotlights critical gaps that can occur around third‑party trainers, emergency preparedness, medical screening, and institutional duty of care in collegiate athletics.

Introduction

A 21‑year‑old Arizona State University hockey player, prospect and St. Louis Blues draft pick Matthew Mayich, collapsed during an outdoor team workout on Aug. 20. The university has publicly acknowledged the incident only recently with a brief social post, while the player’s family has criticized what they describe as an inadequate inquiry. The workout was led by an outside trainer with military experience at the request of the hockey coach. Conflicting characterizations of the session, the player’s grave medical status, and the involvement of a third‑party contractor have turned one practice into a broader examination of how colleges manage risk, supervise outside trainers, and prepare for medical emergencies.

This article reconstructs the known timeline, explains medical conditions that can cause sudden collapse in young athletes, outlines standard emergency and investigative protocols, examines legal and institutional liability issues, and reviews reforms other high‑profile cases prompted. The goal is to clarify what is known, what remains unclear, and what steps athletic programs typically take to protect players and respond when things go wrong.

What happened: timeline and the university’s public response

On Aug. 20 — the first day of fall semester classes — Arizona State hockey held a 50‑minute outdoor conditioning session led by a contracted trainer, an ex‑Green Beret identified publicly as Tim Ziesel. During that session, defenseman Matthew Mayich collapsed and was later hospitalized. Mayich, 21, who had been selected by the St. Louis Blues in the sixth round of the 2023 NHL Draft, remains in a coma.

The university issued a restrained public acknowledgement on X with a graphic that read “Thinking of you 27,” followed by a message saying the team and community were keeping Mayich and his family in thoughts and prayers. That post amounted to the first direct public comment from the program about the incident.

The family’s attorney, Robert Carey, has publicly asserted that Arizona State University has not properly investigated the circumstances of the workout and that Mayich has “zero chance of recovery.” In contrast, the trainer’s lawyer described the session as “mid‑level intensity” and comparable to typical high‑school football conditioning.

Head coach Greg Powers had requested the trainer lead the session, according to reporting. Beyond those elements, details remain limited in the public record: what precisely occurred in the minutes before Mayich’s collapse, what medical interventions were provided at the scene, and the content of any internal reports or video documenting the incident.

Who is Matthew Mayich: background and implications for a young prospect

Mayich entered the college hockey ranks as a promising young defenseman. Drafted by the NHL’s St. Louis Blues in 2023, he represented a potential pathway to a professional career. For a player of his profile, preseason conditioning and team workouts are essential both for competitive positioning and injury prevention. The sudden and severe nature of his collapse places significant personal and professional stakes on the incident: beyond an immediate medical crisis, there is the potential end of a hockey career and long‑term neurological consequences.

The plight of high‑profile student‑athletes often attracts scrutiny not only because they are public figures on campus but also because the outcomes expose systemic practices — how teams organize off‑ice training, how outside vendors are vetted, and how rapidly programs mobilize when a crisis unfolds.

The workout, the contractor model, and questions about oversight

Hiring outside trainers and strength coaches is common in collegiate athletics. Programs sometimes augment staff during preseason with specialists who bring unique experience: military‑style conditioning, strength and conditioning certifications, or sport‑specific expertise. Those contractors can deliver intense, focused sessions that challenge endurance, strength, and mental toughness.

That model brings potential benefits: outside trainers can provide advanced programming, extra manpower for large rosters, or concentrated expertise. It also creates governance challenges. Institutions must ensure third‑party trainers have appropriate certifications, medical clearance, and alignment with university policies — including emergency action plans (EAPs), communication protocols with team medical staff, and limits on intensity for certain population groups.

In this case, ASU’s head coach asked the ex‑Green Beret to lead the workout. The family lawyer asserts that the workouts were “grueling,” while the trainer’s lawyer contends the session was mid‑level. Those conflicting accounts frame key investigative questions:

• Who planned the session and approved its intensity?
• Was the trainer credentialed through standard strength and conditioning certifications (e.g., NSCA CSCS, collegiate strength coach credentials)?
• Were athletic trainers or team medical staff present and empowered to stop or modify the workout?
• Were emergency medical resources — AEDs, trained personnel, ambulance access — available and deployed promptly?

Answers to those questions determine whether the session adhered to the program’s internal policies and to commonsense standards for athlete safety.

Medical possibilities: why healthy young athletes collapse

Sudden collapse in young athletes can result from several distinct medical problems. Understanding the typical differential diagnosis clarifies why immediate medical response and post‑event evaluation are so critical.

Primary medical causes to consider

• Sudden cardiac arrest (SCA): The leading immediate cause of sudden collapse in young athletes is an abrupt loss of heart function, often from ventricular fibrillation or other lethal arrhythmias. Underlying conditions such as hypertrophic cardiomyopathy, arrhythmogenic right ventricular cardiomyopathy, anomalous coronary arteries, or electrical channelopathies can predispose individuals to SCA. Commotio cordis — a rare arrhythmic event triggered by chest impact — is another cardiac cause.
• Exertional heat stroke: Intense exercise in heat can trigger life‑threatening hyperthermia. Core body temperatures rise rapidly, and multi‑organ failure can follow without prompt cooling. Heat stroke often presents with collapse, confusion, and high core temperature, and needs immediate rapid cooling.
• Exertional rhabdomyolysis: Severe muscle breakdown releases myoglobin and other intracellular contents into the bloodstream, which can cause kidney injury and metabolic disturbances that lead to collapse.
• Sickle cell trait complications: Under certain extreme exertional conditions, individuals with sickle cell trait may experience exertional collapse related to red blood cell sickling and end‑organ complications.
• Neurological events: Seizures, stroke, or traumatic brain injury from a fall can lead to sudden collapse.
• Hypoglycemia or metabolic derangements: Less common in otherwise healthy young athletes but still a possible contributing factor.

Differentiating features at the scene

• Cardiac arrest typically entails sudden collapse, no pulse, and rapid loss of consciousness. Immediate CPR and early defibrillation with an AED are critical.
• Heat stroke often evolves over minutes to hours during or after exertion, with high body temperature, altered mental status, and sometimes seizure-like activity.
• Rhabdomyolysis may present with muscle pain, dark urine, weakness, and metabolic abnormalities that are confirmed with laboratory testing.

Because symptoms overlap — for example, collapse can accompany both cardiac arrest and heat stroke — definitive diagnosis requires hospital evaluation: cardiac monitoring, blood tests (including troponin and creatine kinase), imaging, and sometimes genetic testing or cardiac MRI.

Emergency response and prognosis: how outcomes are determined

A collapsed athlete’s immediate survival and neurological outcome hinge on three variables: time to recognition, time to effective resuscitation, and time to definitive care. Those three intervals are often summarized as recognition → CPR/AED → advanced medical care.

Key elements of effective on‑site emergency response

• Rapid recognition and activation of emergency protocols: coaches and staff must quickly identify that an athlete is in distress and call for help.
• Immediate high‑quality chest compressions: providing continuous, effective CPR maintains circulation to vital organs.
• Early defibrillation with an AED when needed: survival from out‑of‑hospital cardiac arrest falls sharply with each minute of delay to defibrillation.
• Effective airway management and oxygenation: ensuring adequate oxygen delivery once circulation is restored affects brain recovery.
• Rapid transport to definitive care: advanced cardiac life support and targeted temperature management may be used in the hospital.

Neurological prognosis after collapse When a patient suffers a period of insufficient oxygen delivery to the brain — whether from cardiac arrest or severe collapse with respiratory compromise — neurological outcomes depend on the duration and severity of hypoxia. Short, well‑corrected episodes can result in full recovery; prolonged anoxia increases the risk of severe brain injury, persistent vegetative state, or brain death. Medical teams use clinical exams, neuroimaging, and functional assessments over time to determine prognosis. Families and legal representatives sometimes receive candorous prognostic statements, as in this case, but clinicians typically await an extended evaluation before making definitive declarations.

The family attorney’s statement that Mayich has “zero chance of recovery” signals that treating clinicians have likely provided a bleak prognosis based on objective neurological assessments. Without access to medical records, specifics cannot be confirmed here; however, such language often reflects catastrophic anoxic brain injury or brain death.

Legal and institutional responsibility: what investigations typically examine

When an athlete collapses during a supervised session, multiple entities may investigate: the institution’s athletic department, an internal compliance or risk office, law enforcement (if criminal conduct is suspected), independent external reviewers, or civil litigation. Typical investigative lines of inquiry include:

• The planning and approval process for the workout: who designed it, who authorized it, and whether an approved plan existed for intensity, duration, and contingency adjustments for heat or other conditions.
• Credentials and vetting of personnel: were outside trainers properly credentialed and cleared by the university? Did they have necessary certifications (CPR/AED, first aid, strength and conditioning credentials)?
• Presence and actions of medical staff: were athletic trainers, team physicians, or emergency medical technicians present? If not, why not? If present, did they have adequate resources and authority to stop the workout?
• Emergency preparedness: was an emergency action plan in place and rehearsed? Were AEDs immediately available? What was the time to first medical contact, first compression, first defibrillation (if used), and ambulance arrival?
• Documentation and recordkeeping: were medical histories and pre‑participation physicals completed? Were any prior symptoms, medical warnings, or risk factors recorded?
• Environmental factors and monitoring: what were environmental conditions (temperature, humidity)? Was there a heat‑acclimatization plan? Were hydration breaks scheduled and enforced?

When third‑party contractors are involved, investigations probe contracting processes and the scope of authority granted to nonemployee trainers. Universities typically have vendor management offices and risk transfer mechanisms (insurance, indemnification clauses). Litigation may allege negligence in supervision, wrongful death (in fatal cases), negligent hiring/retention, or failure to provide adequate medical care.

The family lawyer’s claim that ASU did not properly investigate may reflect frustration with internal reviews that do not satisfy outside scrutiny. Institutions sometimes conduct internal reviews that are later supplemented by external independent investigations — as occurred in other high‑profile collegiate cases.

Precedents: previous cases that changed policy and practice

High‑profile emergencies in collegiate and professional sports have led to concrete policy changes.

Jordan McNair (Maryland football, 2018)

• McNair collapsed during a high‑intensity offseason workout and later died of heatstroke complications. His death triggered an extensive investigation, criticisms of coaching practices, and reforms in how programs supervise conditioning, manage heat protocols, and discipline staff. The case produced recommendations on heat‑illness prevention, mandatory medical oversight during high‑intensity sessions, and transparent investigations.

Damar Hamlin (Buffalo Bills, 2023)

• On‑field sudden cardiac arrest during an NFL game drew attention to the value of immediate CPR and defibrillation. Hamlin’s recovery highlighted the critical role of early intervention and confirmed that rapid, high‑quality resuscitation can produce favorable outcomes even in dramatic SCA events.

These and other incidents have pushed schools and leagues to adopt stricter EAPs, require standardized heat‑acclimatization protocols, and emphasize AED placement and staff training. The ASU incident will likely revive scrutiny of similar safeguards in hockey programs and for off‑ice conditioning.

Best practices colleges should follow — and what may be lacking here

Collegiate programs that minimize risk invest in both prevention and preparation. Best practices include:

1. Rigorous vendor vetting and credential verification
   • Require certifications (e.g., certified strength and conditioning specialist credentials where appropriate), documented training in sports medicine basics, and background checks for contractors.
   • Define the scope of practice for third‑party trainers and require collaboration with university medical staff.
2. Pre‑participation evaluation and individualized risk stratification
   • Maintain up‑to‑date pre‑participation examinations and cardiac screening questionnaires. Consider targeted additional testing when histories or sport demands indicate risk.
   • Ensure providers document prior concussion history, prior syncopal episodes, or exertional symptoms that may alter exercise prescriptions.
3. Heat‑acclimatization and intensity scaling
   • Use progressive workloads for early‑season sessions, especially during extreme heat or for athletes returning from inactivity.
   • Monitor environmental heat stress (wet-bulb globe temperature) and adjust or cancel sessions as warranted.
   • Implement mandatory hydration breaks and rest intervals.
4. Medical staffing and authority
   • Designate athletic trainers and/or team physicians who have authority to halt, modify, or cancel sessions based on athletes’ safety.
   • Ensure a clear chain of command and documented roles for emergency response.
5. Emergency action plans and rehearsals
   • Maintain accessible, rehearsed EAPs for each training venue. Identify roles, phone numbers, AED locations, and nearest ambulance access.
   • Conduct regular drills so staff and athletes know what to do if collapse occurs.
6. AED availability and training
   • Place AEDs in visible, easy‑access locations at all practice sites. Ensure multiple staff are trained and maintain AED readiness logs.
7. Post‑event transparency and independent review
   • When serious incidents occur, consider prompt external, independent review to ensure objectivity and to rebuild trust with athletes and families.
   • Share transparent findings with appropriate parties while respecting privacy laws.

If any of these elements were absent or deficient in the ASU incident, they will be focal points for investigators and potential litigation.

The role of the coach and institutional culture

Coaches set the tone for acceptable risk and determine whether athlete welfare supersedes competitive imperatives. Hiring outside trainers can be an effective strategy to enhance programming, but doing so without clear integration into medical oversight creates vulnerabilities. Coaches must ensure:

• Medical staff are consulted on session plans.
• Outside trainers adhere to university policies and are prepared to follow instructions from team medical personnel.
• There is a culture that permits stopping workouts without stigma.

When allegations arise that workouts were “grueling” beyond reasonable limits, investigators examine whether the program culture incentivized pushing athletes past safe limits.

Third‑party contractors: unique liabilities and risk transfer

Using nonemployee trainers creates two sets of questions: operational control and legal responsibility. Even when a trainer is a contractor, the university can be held liable if it authorized or participated in the unsafe activity or failed in its supervisory duty. From a risk management standpoint, institutions should:

• Require contractors to carry professional liability insurance and name the university as an additional insured where appropriate.
• Use written contracts that specify required certifications, adherence to EAPs, qualifications for onsite emergency response, and clear reporting relationships with team medical staff.
• Preserve and store documentation of training plans and attendance logs.

If the contracted trainer acted outside the agreed scope, contractual remedies and insurance may shift some liability. But courts and juries evaluate the facts: who controlled the session, what instructions were given, and whether the university tolerated or encouraged risky behavior.

Mental health and team impacts: support beyond medical treatment

A catastrophic medical event affects teammates, staff, and the broader student‑athlete community. Emotional trauma, survivor guilt, and anxiety about personal safety can persist. Programs that respond well address both physical and psychological aftermath:

• Provide immediate mental health counseling for teammates and staff.
• Offer grief resources and time away from competition if needed.
• Communicate transparently to reduce uncertainty and rumor.

The ASU X post’s “Thinking of you 27” message is a start, but sustained, tangible support and clear communication matter to players and families.

What investigators and the public are likely to seek

The immediate public will look for answers to several questions:

• What exactly was the workout content? Were there videos or written plans?
• Who else was present and what actions did they take in the minutes before and after collapse?
• What medical interventions were provided at the scene? Was an AED used?
• Did Mayich have any known preexisting conditions, symptoms, or warning signs?
• Why did it take more than two weeks for a public acknowledgment from the program?

Investigators (internal and external) will collect witness interviews, training plans, medical records, equipment logs (AED checklists), and any available video. If criminal negligence or willful misconduct is suspected, law enforcement could involve themselves. Civil litigation — if filed — will conduct discovery into the same documents and into communications among coaches, staff, and contractors.

Potential legal pathways without presuming outcome

If the family pursues civil litigation, common legal theories could include negligence (failure to exercise reasonable care), negligent hiring or retention (if the contractor lacked qualifications), negligent supervision (if medical staff were absent or powerless), and, where death occurs, wrongful death. Remedies typically sought are compensatory damages for medical costs, pain and suffering, and in some jurisdictions punitive damages if conduct is deemed particularly reckless.

Universities frequently engage in internal reviews and may settle claims to avoid prolonged litigation and reputational damage. However, settlements vary widely and often include confidentiality terms. An independent investigation can both inform the public and strengthen institutional accountability.

How similar cases led to policy change and what that suggests

The Jordan McNair case prompted specific reforms: institutions strengthened heat protocols, limited coach authority in conditioning sessions, and emphasized athletic trainer presence during high‑risk practices. The Damar Hamlin incident renewed focus on AED access and on‑site CPR competence in all levels of sport. Those examples suggest potential outcomes here:

• Athletic departments may revise vendor supervision and require stronger documentation for third‑party trainers.
• Conferences or state athletic regulators could push for more uniform EAP requirements and mandatory EAP rehearsal schedules.
• NCAA or college governance bodies might consider model policies for contractor usage, certification, and medical oversight.

Institutions often respond to individual tragedies by codifying best practices to reduce the likelihood of recurrence. The specifics follow from the facts established in investigations.

What the program and stakeholders should do now

For families, teammates, and the public seeking accountability and better protection for athletes, concrete steps include:

• Conduct an independent external review of the incident and publish key findings consistent with privacy obligations.
• Review and, where necessary, strengthen credential and contracting processes for outside trainers.
• Confirm that EAPs are up to date and rehearsed, and that AEDs and emergency supplies are readily accessible at all practice sites.
• Ensure athletic trainers and team physicians have the authority to modify or stop workouts and that their authority is respected.
• Provide ongoing support to teammates in the form of counseling and structured debriefing.

Public institutions have a fiduciary and ethical duty to student‑athletes. Transparent, timely action that prioritizes safety will help rebuild trust — whether or not litigation follows.

Broader implications for collegiate athletics

This incident amplifies long‑standing tensions in college sports: the pressure to prepare elite athletes for competition, the use of external expertise to supplement staff, and the ethical obligation to safeguard students. Athletic departments operate within constrained budgets and face competitive pressure to win and to develop pro prospects. Those pressures can create short‑term decisions that have long‑term consequences.

Universities must balance ambition with prudence. When outside trainers are used, programs must mandate that they operate within medical oversight and documented safety frameworks. Student‑athletes deserve training that pushes them appropriately but never at the expense of essential protections.

What to watch next

• Any independent investigation or external review commissioned by Arizona State University and whether findings will be made public.
• Statements or additional disclosures from team medical staff, the trainer, or legal filings that provide more specifics about the sequence of events and the emergency response.
• Potential policy changes at ASU regarding contracted trainers, EAP rehearsals, and prescriptive limits on preseason conditioning intensity.
• Whether the family files a civil claim and what facts emerge through discovery.
• Wider responses across college hockey and the NCAA community about best practices for off‑ice conditioning.

The coming weeks and months will determine whether the event remains an isolated tragedy or a catalyst for broader reform.

FAQ

Q: What caused Matthew Mayich to collapse? A: Public reports have not released a definitive medical cause. Sudden collapse in young athletes can result from sudden cardiac arrest, exertional heat stroke, rhabdomyolysis, sickle cell‑trait complications, neurological events, or metabolic problems. Determining the cause requires hospital diagnostic workups, including cardiac monitoring, blood testing, and imaging. The family’s lawyer has said Mayich has "zero chance of recovery," indicating catastrophic neurological injury, but official medical details have not been fully disclosed publicly.

Q: Who led the workout and why does that matter? A: The session was led by an ex‑Green Beret trainer who was contracted to run the outdoor workout at the request of ASU hockey head coach Greg Powers. Third‑party trainers can be valuable, but their involvement raises questions about vetting, scope of authority, certifications, coordination with team medical staff, and whether the program’s EAPs were followed. Investigators typically examine these elements closely.

Q: Did ASU respond appropriately? A: ASU issued a brief public message expressing support for Mayich and his family. The player’s family, through their lawyer, has criticized the university for not properly investigating the circumstances. Whether the university’s internal response met professional standards depends on facts still emerging: the presence and actions of medical staff, the content of internal reviews, and whether an independent investigation follows.

Q: Could this incident have legal consequences? A: Yes. Family members can pursue civil claims alleging negligence, negligent supervision, negligent hiring, or wrongful death if applicable. The legal analysis will examine the evidence about what happened, who controlled the session, what emergency measures were taken, and whether the university and contractors met standard care obligations. Institutions sometimes face settlements or policy reforms after such incidents.

Q: What immediate safety measures should athletic programs enforce to prevent similar events? A: Programs should ensure thorough pre‑participation evaluations, require credential verification for contractors, implement and rehearse EAPs, keep AEDs available and maintained, provide clear authority to athletic trainers to halt sessions, adopt heat‑acclimatization protocols, and ensure robust mental health support when crises occur.

Q: How common are collapses like this in collegiate athletics? A: Sudden collapse is rare but not unheard of. Sudden cardiac arrest remains the leading cause of sports‑related death in young athletes. The relative rarity does not diminish the severity of consequences when events occur, which is why prevention, preparedness, and clear procedures are critical.

Q: What should teammates and families expect in terms of institutional transparency? A: Institutions vary in their transparency practices. Many universities commission independent reviews when serious incidents occur and release findings consistent with legal privacy obligations. Families and teammates often request clear timelines, disclosure of procedural findings, and affirmative steps to prevent recurrence. Advocacy from families and the public can influence whether institutions pursue independent investigations and adopt reforms.

Q: What kind of long‑term outcomes might a patient in a prolonged coma face? A: Long‑term outcomes vary widely. Some patients recover significantly, while others sustain severe, permanent neurological impairment or progress to brain death. Prognosis depends on the duration and severity of oxygen deprivation, the initial cause of collapse, and the timeliness and quality of resuscitation and critical care. Physicians typically perform serial neurological evaluations and imaging over time to form a clearer prognosis.

Q: How can fans and the university community support the team and the family? A: Respect the privacy of the family and teammates while offering tangible support — donations to verified funds if requested by the family, participation in memorials or fundraisers approved by the family, and supporting mental health resources for team members. Public pressure for accountability should focus on constructive measures that prioritize safety and systemic improvements.

Q: Where will more information come from? A: Additional information may emerge from university statements, independent investigative reports, legal filings, or news reporting as parties disclose findings. Families sometimes authorize more detailed medical statements. Investigative timelines depend on the scope of the review and any pending litigation.

This event touches a core responsibility of collegiate athletics: protecting student‑athletes from preventable harm while preparing them to perform at elite levels. The facts so far raise difficult questions about oversight, emergency preparedness, and the calculus that allows intense conditioning to proceed under contracted supervision. Answers will come through thorough, transparent investigation and through concrete policy reforms that ensure safety is not an afterthought when the stakes are highest.