Patriots' Rex Burkhead: Exits game with knee injury

Burkhead was forced out of Sunday's game against the Steelers with a knee injury.

Prior to his exit, Burkhead logged four carries for 12 yards and a touchdown while adding a catch for five yards. His absence leaves more snaps and touches for Dion Lewis and James White, and the team can dust off Mike Gillislee -- who was a healthy scratch Sunday -- if Burkhead misses time beyond Week 15.