The San Francisco 49ers confirmed Monday that defensive star Nick Bosa has torn the ACL in his right knee and will require surgery. The Pro Bowler had left Sunday’s 16-15 win over the Arizona Cardinals with a right knee injury, and did not return. The latest injury for Bosa marks the second time in his career that he has suffered a season-ending ACL injury. He previously tore the ligament in his left knee during a Week 2 game against the New York Jets in 2020. Back in 2015, as a high school senior, he also sustained a partial ACL tear in the same right knee.