Bengals quarterback Joe Burrow was carted off the field after injuring his left knee against the Washington Football Team. Geoff Burke-USA TODAY Sports

Bengals rookie QB Joe Burrow carted off field with knee injury

The Cincinnati Bengals are praying that their rookie quarterback didn't suffer a serious leg injury on Sunday against the Washington Football Team, but things don't look very good. 

Joe Burrow exited the contest in the third quarter with a knee injury and was carted off the field as he couldn't put any weight on his left leg.

Injury analyst Mario Pilato of Pro Football Focus says Burrow hyperextended his leg and possibly suffered a torn ACL and/or an MCL injury. If that's the case, his rookie season would over. 

Before exiting, Burrow completed 22 of 34 passes for 203 yards and one touchdown. He also had 2 carries for 12 yards. 

The LSU product has shrugged off some pretty big tackles this season, including one from Washington rookie defensive end Chase Young on Sunday, who caused Burrow to fumble at the goal line in the second quarter.

Burrow entered Sunday's game with a 2-6-1 record, completing 65.4 percent of his passes for 2,485 yards and 12 touchdowns against five interceptions with 35 carries for 130 yards and three touchdowns. 

If Burrow is done for the season, Ryan Finley would be in line to start for the Bengals unless they acquire a free agent or elevate someone from the practice squad.

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