By Ben Morse, CNN(CNN) — Missing a plethora of key starters, back-up quarterback Mac Jones led the depleted San Francsico 49ers to a thrilling 26-23 overtime victory over the Los Angeles Rams on Thursday Night Football. It was a gutsy performance by San Francisco as a whole, but in particular from Jones who appeared to be bothered by a knee injury and hobbled to the sidelines on numerous occasions after getting hit by Los Angeles defenders. “He played his ass off, man,” 49ers head coach Kyle Shanahan said of Jones afterwards. The 49ers made a field goal on their opening drive of OT meaning the Rams needed to make their own to continue the game or score a touchdown to win. The victory means that Jones has now gone 3-0 stepping up for Purdy this season, throwing for 905 yards and six touchdowns in that span.