The Day the Heat Turned Deadly
On August 20, the first day of Arizona State’s fall semester, 21‑year‑old defenseman Matthew Mayich collapsed during a grueling outdoor conditioning drill. The session, conducted in Tempe under 86°F heat and high humidity, was meant to be a team‑building rite but quickly became a medical emergency.
Coached by former service member Tim Ziesel, the hour‑long workout combined sprints, planks, push‑ups, bear crawls and a final run with a medicine ball across a football‑length field. Athletes who hesitated were instructed to repeat the exercises, and complaints were discouraged.
A Question of Oversight
Ziesel, who served in the Navy and Army Special Forces, left the field before the final activity and has refused to answer questions about his qualifications or the workout’s purpose. Arizona State officials declined to disclose who authorized the session or whether coaches were present, citing privacy concerns.
Expert Voices
Rebecca Stearns, COO of the Korey Stringer Institute, warned that punishment‑based training is ineffective and can be lethal, citing a string of heat‑related hospitalizations linked to similar drills. Rod Walters, an athletic trainer, noted a decline in such methods after past incidents, while Lt. Colonel David DeGroot emphasized the need for gradual acclimation and vigilant monitoring.
The NCAA’s own heat‑illness guidelines explicitly discourage intense conditioning early in the season, a rule that was flouted on the day Mayich collapsed. The organization has faced criticism for limited enforcement of those standards.
A Broader Reckoning
The incident has reignited calls for stricter oversight of off‑season workouts, especially those led by civilian instructors without verified credentials. Dr. Stephen Paul, former Director of Athletic Medicine at the University of Arizona, argues that proper evaluation, emergency action plans and cooling measures are non‑negotiable for player safety.
As the university reviews the circumstances, the case serves as a stark reminder that the first day of a new season should never be the hardest. If heat‑related fatalities continue to rise, the culture of unchecked military‑style conditioning may finally be forced to change.