ASU Heat Training Under Fire

A 21-year-old St. Louis Blues prospect collapsed during an Arizona State University outdoor workout and remains hospitalized as the school reviews how the session was run.

Story Snapshot

Arizona State University says a men’s hockey player collapsed during an outdoor exercise and is still hospitalized.
Local officials logged a heat-related medical call at the campus track that morning.
Reports identify the athlete as defenseman Matthew Mayich, a Blues draft pick.
The university is reviewing the workout’s circumstances; details remain limited.

Confirmed Timeline From Campus And Local Responders

Arizona State University said a men’s hockey player collapsed during an outdoor exercise on the morning of August 20 and remains hospitalized. The school said it is reviewing the workout’s circumstances and did not name the athlete due to privacy rules. Tempe Fire Medical Rescue said crews responded around 8:30 a.m. to the Joe Selleh Track for a heat-related illness and took one person to a hospital. Those details place the event at a campus facility during a morning session.

Multiple outlets identify the player as defenseman Matthew Mayich, who plays for Arizona State and was drafted by the St. Louis Blues. ESPN reported that the university is investigating the workout in which Mayich collapsed. The Arizona Republic said he suffered what was described as a possible cardiac event, citing people close to the family. The Hockey News shared a statement from Blues executive Doug Armstrong offering support and prayers for Mayich’s recovery.

What Authorities And Teams Are Saying Now

Arizona State University said it is reviewing everything about the workout and cited privacy in limiting details. The St. Louis Blues acknowledged Mayich’s treatment and expressed support, while avoiding medical labels that doctors have not confirmed publicly. Reporters have described the session as outdoors in high heat. Officials documented a heat-related call at the track that morning, which aligns with that framing, but the exact diagnosis has not been released.

ESPN and local coverage say the university is examining whether the workout’s planning and supervision met standards for athlete safety. That aligns with a common process after severe training incidents on campuses. Schools often review coaching decisions, weather planning, hydration access, and emergency response steps. The goal is to learn what happened and reduce risk going forward. The school has not disclosed who led the session or the specific drills used.

Why This Matters For Player Safety And Oversight

College athletes train year-round, often outdoors, and sometimes in high heat. National research shows exertional heat illness is not common, but it does occur across sports seasons. One National Collegiate Athletic Association study found 232 events across about 4.9 million athlete-exposures, or 0.47 per 10,000 athlete-exposures. These numbers show the risk is real, even if rare. That is why schools set practice plans, heat policies, and emergency steps in advance.

And suffers…'suddenly'😪💔
*Matthew Mayich-21-Canada
*Arizona State University Hockey Player and St. Louis Blues prospect
*August 20, 2026: Teammates say Matthew was fine one second, then collapsed on the ice without warning…🙏
*August 31, 2026: Tragically, Matthew remains… pic.twitter.com/XVl1GkJgiS

— cheri maday (@resilient333) August 31, 2026

Medical groups advise simple but strict rules when heat stress is possible. Leaders should adjust or cancel workouts in extreme conditions. Staff should recognize warning signs fast and act right away. Guidelines also stress having cold-water immersion and trained help on site for suspected exertional heat stroke, since quick cooling can save lives. Reviews like Arizona State University’s often check if these steps were in place and followed.