A graduate with Navy SEAL training led the voluntary, supervised workout on Sept. 16. Nine players were hospitalized, with the last one discharged Wednesday.

All nine members of the Tufts University men’s lacrosse team who were hospitalized this month with the rare muscle injury rhabdomyolysis have been discharged, and the university says it has hired experts to investigate what led to so many serious injuries after a training session.

Moving forward, we must come to a clear understanding of what happened and ensure it never happens again," Tufts said via a statement