Free safety Ryan Clark looked a bit woozy after a hit during the Steelers' 16-13 (OT) win over the Kansas City Chiefs in Week 10, and was limited in practice on Wednesday. He practiced fully on Thursday, though, and it appears as if he will play Sunday.
It's a good thing, too. The Ravens have one of the more potent offenses in the NFL, and Clark will be challenged both on the ground and through the air.
The issues through the air may be more of an issue on the Steelers' offensive side of the ball. Without Ben Roethlisberger, the Steelers are also likely to lose wide receiver Antonio Brown for this game. He suffered a high ankle sprain in Pittsburgh's Week 9 win over the New York Giants, and missed the game against the Chiefs. He has not practiced this week, and although he has not been officially ruled out, it doesn't appear likely right now he will play.
Troy Polamalu and Marcus Gilbert also missed practice Thursday, as well as Wednesday. Polamalu has been out since Week 6, and Gilbert since Week 7.
In a rare practice day for the Steelers, all three of their top running backs - Rashard Mendenhall, Jonathan Dwyer and Isaac Redman - all practiced fully Thursday and are expected to play.