The Ravens initially said Mosley was being evaluated for a knee injury when he left the game early in the first quarter.
After the game, head coach John Harbaugh said the injury "doesn’t look to be long term," and that the team would see how it responds over the next few days, per ESPN's Jamison Hensley. Harbaugh didn't know whether his linebacker would be available for Baltimore's Week 3 matchup with the Denver Broncos next Sunday.
Mosley appeared to injure himself while hopping over a Bengals receiver who was on the ground at the end of a play.
The 26-year-old Mosley led the Ravens with 132 tackles last season while earning his third career Pro Bowl nod.
A former first-round pick of the Ravens, Mosley is in the fifth and final year of his rookie contract.