The NFL will investigate why Cincinnati did not list Joe Burrow on the team’s injury report before the quarterback was knocked out of a loss to Baltimore with a sprained right wrist, a person familiar with the decision told The Associated Press on Friday.

The Bengals had posted and later deleted a video on social media that showed Burrow getting off a team bus with his right hand in what appeared to be a soft cast.

Such reviews are not uncommon with the NFL regularly looking into similar cases, according to the person who spoke to the AP on condition of anonymity because the review is not being publicly discussed. Teams can be fined or lose a draft pick for violating the NFL’s injury report policy. first reported the investigation into the Bengals (5-5).

Burrow, 26, left in the second quarter Thursday night after throwing a 4-yard touchdown pass to Joe Mixon. When Burrow tried a practice throw on the sideline, the ball slipped out of his hand as the quarterback winced. Burrow then went to the locker room and looked frustrated.

Burrow was 11 of 17 for 101 yards and the TD when he left. Backup Jake Browning replaced him with the Bengals trailing 14-10, and Baltimore won 34-20. After the game, Cincinnati coach Zac Taylor couldn’t predict how long Burrow might be out with the wrist injury.

Burrow dealt with a calf injury earlier this season, but he hasn’t missed a game this year.