Miller, of course, suffered a concussion against the Ravens.
But, Tomlin said that backup Matt Spaeth, who has missed the past two weeks with a concussion, has been cleared to play.
The Steelers signed punter Jeremy Kapinos to replace Daniel Sepulveda.
Aaron Smith had an MRI Monday and has been cleared to begin lifting weights.
I'm told he's targeting the Carolina or Cleveland games for a return.
Flozell Adams has what Tomlin deemed a "mild" high ankle sprain.
If he cannot play, Trai Essex would start in his place at right tackle.
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