Pittsburgh Steelers' Ben Roethlisberger Carted Off Field With Concussion

Key NFL Injuries

Ben Roethlisberger: The Steelers quarterback sustained a concussion after taking a hard hit during Pittsburgh's Week 17 victory over Cleveland. Big Ben was strapped to a backboard and carted off the field.

Tom E. Puskar, AP

Anquan Boldin, Arizona Cardinals: The two-time Pro Bowler was carted off the field after a scary helmet-to-helmet collision with the Jets' Eric Smith, but has since returned to the field for the Cardinals. Boldin had surgery for a broken facial bone, while Smith was suspended and fined for the hit.

Mel Evans, AP

Carson Palmer, Cincinnati Bengals: The Bengals quarterback has only played four games this season due to a sprained right elbow injury that he sustained Sept. 21 at the Giants.

David Kohl, AP

Vince Young, Tennessee Titans: The young QB sprained his left knee and was also booed in the Titans' 17-10 win over the Jaguars in Week 1. While Young is now healthy, veteran Kerry Collins has taken over the starting QB gig.

John Russell, AP

Shawne Merriman, San Diego Chargers: After playing just one game this season, the imposing linebacker finally decided to listen to doctors and have season-ending surgery on his torn left knee ligaments.

Stephen Dunn, Getty Images

Tom Brady, New England Patriots: Brady tore the ACL in his left knee in a Week 1 victory over the Chiefs. The future Hall of Fame QB's 128 consecutive start streak officially ended when Brady decided to have season-ending surgery a month later.

Paul Jasienski, Getty Images

Marion Barber, Dallas Cowboys: The Cowboys running back has dealt with two separate injuries this season. He suffered bruised ribs against the Browns, and later dislocated his right pinkie toe in a Week 13 win over the Seahawks.

Ron T. Ennis, Fort Worth Star-Telegram / MCT

Roy Williams, Dallas Cowboys: And, just like that, the Cowboys were knocked down to one Roy Williams again. Roy Williams, the safety, broke his right forearm for the second time this season in Dallas' loss to the Rams in Week 7.

Jeff Roberson, AP

Rodney Harrison, New England Patriots: New England's safety was knocked out for the season - and possibly for his career - when he tore his quad muscle in a Week 7 victory over the Broncos.

Michael Dwyer, AP

Keith Rivers, Cincinnati Bengals: In October, Cincinnati lost Rivers for the season after Pittsburgh wide receiver Hines Ward peeled back and delivered a punishing block that broke Rivers' jaw. Watch Video of Big Hit

Tom Hauck, Getty Images