Here the major injuries in the division and what they mean:
BENGALS: DE Carlos Dunlap (hamstring, doubtful) hasn't practiced all week and will miss his fourth game in five weeks. CB Nate Clements (hamstring, questionable) returned to practice for the first time this week on Friday, which boosts his chances of playing after missing last game. RT Andre Smith (ankle, questionable) has been limited the past two days and should start. RB Cedric Benson (probable, foot) has been dealing with this injury for two weeks. ... For the Texans, WR Andre Johnson (hamstring) has been ruled out. He will be replaced by Jacoby Jones, which is a major dropoff. This is the seventh missed game for Johnson this season.
RAVENS: K Billy Cundiff (left calf, questionable) has missed the past two practices and is considered a game-time decision. "I’m hopeful. I really am hopeful," coach John Harbaugh said. "We’ll have a backup plan for sure." If he can't go, the Ravens would turn to Shayne Graham, who was in Baltimore's training camp a couple of years ago. LB Ray Lewis (toe, questionable) hasn't practiced all week and is expected to return next week. C Matt Birk (shoulder, probable) returned to practice Friday. ... For the Colts, leading tackler Pat Angerer (knee, questionable) had a full practice Friday after being limited Thursday. TE Dallas Clark (fibula, questionable) and WR Anthony Gonzalez (groin, questionable) both had full practices Friday.