The Cleveland Browns wrap up their season at the Pittsburgh Steelers Sunday, and Cleveland's injury report is littered with key contributors. Quarterbacks Brandon Weeden and Colt McCoy and running back Trent Richardson have all been ruled out.

Cornerback Sheldon Brown and tight end Jordan Cameron are recovering from concussions and will also miss Sunday's game. Brown will see his streak of 175 consecutive games played broken.

#Browns Weeden, McCoy, Richardson, Brown. Cameon officially out. BROWN'S STREAK ENDS AT 175 GAMES.

— Jeff Schudel (@jsbrownsinsider) December 28, 2012

With Weeden and McCoy out, Thaddeus Lewis will likely receive the start at quarterback for Cleveland. Lewis, a second-year player out of Duke, will be the third quarterback to play for the Browns this season.

Thad Lewis now officially the 18th QB to start a game for the #Browns since 1999. Averages out to 1 QB every 12.4 games. #fixit

— Tony Grossi (@TonyGrossi) December 28, 2012

Montario Hardesty will likely start for Richardson, who set the Browns rookie rushing record with 950 yards this season. Hardesty has 234 yards and a touchdown on 51 carries in 2012.

The Browns wrap up their season Sunday at Pittsburgh's Heinz Field. Kickoff is set for 1 p.m. ET, and the game will be televised on CBS.