Cincinnati Bengals quarterback Joe Flacco has a sprained AC joint in his right shoulder and his status is unknown for Sunday's game against the Bears, according to NFL Network's Ian Rapoport.

Though the Bengals say it's "50/50" whether he will play Sunday vs. the Bears, QB Joe Flacco was back at practice Thursday afternoon.

Flacco was traded to the Bengals on Oct. 7 and then started a Week 6 game for them just five days later in a 27-18 loss to the Green Bay Packers. In Week 7, he had to to turn around and play a Thursday game against the Steelers and he ended up throwing for 342 yards and three touchdowns in a 33-31 win that came after just two days practice.

Cincinnati Bengals quarterback Joe Flacco's injury may be more serious than previously thought. This article originally appeared on Steelers Now: Severity of Bengals QB Joe Flacco’s Injury Revealed

CINCINNATI — Bengals quarterback Joe Flacco returned to practice on Thursday. The 40-year-old is dealing with an AC Joint Sprain in his throwing (right) shoulder. Flacco warmed up like normal with his teammates and was going through his standard throwing routine after the team stretch period.

New Cincinnati Bengals quarterback Joe Flacco admitted he has found quiet joy in solo moments while his family remains home in New Jersey after his move to Ohio.