Justin Fields' Week 11 ended early on the sideline.
The Chicago Bears rookie quarterback suffered a ribs injury in the second half of Sunday's 16-13 loss to the Ravens and did not return.
NFL Network Insider Ian Rapoport reported Sunday night that Fields is believed to have suffered bruised ribs. He'll have more tests on Monday and continue to be monitored, but it's good initial news, Rapoport added.
Andy Dalton entered the game in place of Fields and nearly led Chicago to an improbable win, but Devonta Freeman's touchdown run with just seconds left in the game proved to be the difference for Baltimore.
Fields headed to the locker room after being monitored in the blue tent on the sideline. Fields completed 4 of 11 passes for 79 yards with no interceptions and compiled 23 rushing yards off four attempts at the time of his exit.
Bears coach Matt Nagy told reporters after the loss that he had no update on the severity or nature of Fields' ribs injury.
Dalton took over with the Bears down, 6-0, midway through the third quarter.
Dalton quickly made an impact on the Chicago offense, connecting with Darnell Mooney on his second pass of the game for a 60-yard touchdown. Dalton finished 11 of 22 for 202 yards with two touchdowns.
Nagy declined to commit to either Fields or Dalton as his starter for Thursday's Thanksgiving game against the Detroit Lions, citing Fields' progression as a rookie and the uncertain status of his injury.
"Justin's played his tail off. He's played really well," Nagy said. "Justin's done everything that we've asked him to do to be able to grow as a quarterback. He got hurt. So he's done everything to be the starter, continue to be the starter. Andy's done everything to be the guy and continue to work hard where he's at.
"We've just got to see where Justin's at. When you're talking about ribs, you've got to find out how much it affects him. We as a staff got to talk through all that."