Arizona State is investigating an off-ice workout after defenseman Matthew Mayich, an NHL prospect and St. Louis Blues draft pick, collapses during training and is hospitalized. Multiple outlets report that Mayich remains in hospital days after the incident.

Accounts describe the collapse occurring during an Arizona State hockey workout outdoors. Yahoo Sports says paramedics attributed the episode to a “heat-related illness.” The Athletic and Fox News also report the investigation is underway, while providing limited additional details beyond Mayich’s condition and that he is still hospitalized.

Across the reports, the core points align: Mayich is a current Arizona State player, he was a Blues draft pick, he collapses during a team workout, and the incident is linked to exercise conditions that include heat. The outlets differ mainly in the emphasis—some foreground the investigation by the university, while others highlight the paramedics’ characterization of the medical cause.