The head-on collision between Shanahan’s 2023 Tesla Model S and a 2025 Mercedes-Benz GLC SUV happened on July 14 in Palo Alto on Alma Street near Hamilton Avenue. Shanahan was briefly hospitalized after breaking his nose, two ribs, and his left hand, and suffering a concussion along with a laceration near his eye that required dozens of stitches. The Mercedes SUV driver, a 21-year-old woman, had minor injuries that did not require going to the hospital.
The 49ers announced the crash on July 25 after Shanahan failed to show up for the first day of training camp. He has since made appearances at two practices, standing alongside general manager John Lynch.