Arizona State University is investigating the circumstances around Matthew Mayich's collapse last Thursday.
The university is looking into a workout that led to Mayich's collapse and subsequent hospitalization, according to a report from The Athletic's Kate Strand and Jeremy Rutherford on Tuesday.
Mayich, 21, is a defenceman on the Arizona State hockey team and was drafted in the sixth round of the 2023 NHL Draft by the St. Louis Blues. He remained in hospital on Wednesday.
“A student-athlete who collapsed during an outdoor exercise Thursday morning remains hospitalized,” ASU vice president of media relations Chris Fiscus told The Athletic. “The student-athlete, a member of the ASU hockey team, is not being named by the university because of privacy interests. The university is reviewing the circumstances surrounding the workout.”
Fiscus did not say whether the workout was sanctioned by the ASU hockey team.
Per The Athletic's report, "Tempe Fire Medical Rescue sent crews to 400 S. Rural Road, the address for Sun Angel Stadium, at 8:31 a.m. Thursday, after receiving a report of a 'heat-related illness.' A patient was treated there and transported to a nearby hospital, the fire department said."
Mayich has not signed an entry-level deal with St. Louis. He spent his freshman season at Clarkson University in 2025-26, scoring seven goals and 15 points in 34 games.
Mayich announced at the end of the season that he would be transferring to Arizona State for 2026-27.
“The entire Blues organization is keeping Matthew Mayich close to our hearts as we pray for his comfort and recovery while he continues to undergo medical treatment in Arizona," said Blues president of hockey operations Doug Armstrong in a statement released by the team on Wednesday. "His agent has kept us informed about Matthew’s medical status over the last week and we extend our deepest support to his family, friends and teammates during this difficult time.”
Before heading to college hockey, Mayich spent four seasons with the OHL's Ottawa 67's.
