On the Broncos’ fourth play from scrimmage Sunday, quarterback Drew Lock sustained a right shoulder injury when he was hit from behind on a scramble by Chargers’ Pro Bowl defensive end Joey Bosa.

Lock finished out that first drive at SoFi Stadium and played the second series, but went into the locker room for the third series in order to get an injection that numbed his shoulder and enabled him to return to the field.

“The second drive was the most I had felt (the pain),” Lock said. “It felt a little funny. I had it happen to me before (in 2020), and I just needed to go in and get a little shot in it, and come back out. No way was I going to stand on that sideline with what (the score) was. Shoot it up, come back out and give it everything I got (is what I was thinking).”

Lock finished the game 18-of-25 passing for 245 yards and one touchdown, with a passer rating of 116.2 that’s the third-best in his career. Brett Rypien was 0-for-2 on his one drive in Lock’s stead, but Lock said the plan when he left the game was to be back quickly.

“Hopefully I could miss a maximum of one drive and sure enough, that’s what (the trainers and I) did,” Lock said.

According to a video review of Bosa’s hit on Lock by longtime NFL team doctor David J. Chao, Lock likely sustained an AC joint sprain in his throwing shoulder. That’s the same injury he had last year when he was hurt scrambling against the Steelers in Week 2, costing him his next two starts.

Lock is taking a wait-and-see approach with the status of his shoulder entering the final week of the season as the Broncos prepare to host Kansas City. Starting quarterback Teddy Bridgewater remains in concussion protocol and his status is uncertain. Beyond Lock, the Broncos have Rypien (one career start, last year) and practice squad quarterback Anthony Gordon (signed Dec. 21, no career starts).

“We’ll see (on my status),” Lock said. “(My shoulder) is pretty numb right now, so we’ll find out more (with imaging on Monday).”