Please see below for a timeline of the injury updates from throughout the Broncos' Week 4 game against the Ravens.

3:45 p.m. MT: WR Diontae Spencer is questionable to return with a chest injury, the Broncos announced. On a pass route to the flat, Spencer reached for a pass that sailed just beyond his reach. A split-second later, a Ravens defender collided with Spencer with what appeared to be helmet-to-helmet contact. After receiving attention from the training staff on the field, Spencer was helped to the sideline and then immediately to the locker room for further evaluation.

3:57 p.m. MT: QB Teddy Bridgewater is being evaluated for a possible concussion, the team announced. As Bridgewater was seen going to the Broncos' blue medical tent for evaluation shortly before halftime, Drew Lock was observed warming up on the sideline.

4:04 p.m. MT: Spencer has been downgraded to out.

4:07 p.m. MT: Kendall Hinton replaced Spencer for the Broncos' first punt return since Spencer's injury. Lock replaced Bridgewater under center for the offense's first possession of the second half.

4:17 p.m. MT: Bridgewater has been downgraded to out with a concussion.

5:14 p.m. MT: CB Pat Surtain II suffered a chest injury and is out for the remainder of the game.

POSTGAME UPDATE: After the 23-7 loss, Head Coach Vic Fangio spoke with the media and provided a brief update on Bridgewater's condition.

"I don't know how [serious] it is," Fangio said. "I just saw him. He says it's getting better as the day goes on. So, we'll see."

Bridgewater will have to progress through the NFL's concussion protocol before he can be cleared to return to on-field action.