Aldon Smith cause of death: What happened to former All-Pro linebacker

Aldon Smith, the former San Francisco 49ers outside linebacker and one of the most explosive pass rushers of his generation, has died at the age of 36. The 49ers confirmed his passing on June 13, 2026, describing it as sudden and tragic. No cause of death has been made public. Smith, a first-team All-Pro in 2012 with 19.5 sacks that season, saw a career full of promise derailed by repeated off-field issues, including arrests and NFL suspensions. He last played for the Dallas Cowboys in 2020.