Neither Polamalu, who is nursing a strained right calf, nor Harrison, who is recovering from a minor procedure on his left knee, practiced this week. Steelers coach Mike Tomlin typically does not let players who did not participate during the week play in the game.
Harrison, who hasn't suited up for a game since a playoff loss to Denver last January, said he "felt great" but allowed there's a risk in coming back too quickly. The knee has been bothering Harrison since minicamp and he had arthroscopic surgery Aug. 15.
Polamalu has made 18 straight regular-season starts dating to 2010. Running back Rashard Mendenhall, who is recovering from a torn ACL in his right knee suffered in the regular-season finale against Cleveland, practiced all week but has been listed as doubtful.