McPhee had been sidelined with right knee and thigh injuries. He underwent two arthroscopic knee surgeries prior to training camp.
The Ravens will play without starting inside linebacker Dannell Ellerbe today because of a right foot and ankle injury sustained against the San Diego Chargers. Although listed as limited in practice Friday, Ellerbe acknowledged that he didn't really do much at all and would be a game-time decision.
With Ellerbe out, special-teams ace Brendon Ayanbadejo is expected to take the bulk of the work inside opposite Jameel McClain. Albert McClellan could also shift inside, and Josh Bynes is in the mix as well.
The Steelers scratched quarterbacks Ben Roethlisberger (shoulder, ribs) and Byron Leftwich (ribs), running back Rashard Mendenhall, linebacker LaMarr Woodley, cornerback DeMarcus Van Dyke, offensive tackle Mike Adams (ankle) and wide receiver Jerricho Cotchery.
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