Pittsburgh Steelers linebacker James Harrison and safety Troy Polamalu are both listed as questionable for Sunday's game against the New York Jets.
Harrison, who sat out the entire preseason and Pittsburgh's season-opening loss to the Denver Broncos, hasn't practiced all week as he deals with a left knee injury that required arthroscopic surgery on Aug. 15.
Polamalu hasn't practiced all week due to a strained right calf.
Tackle Max Starks (illness) participated fully in Friday's practice and is listed as probable, while linebacker Stevenson Sylvester (knee) has been ruled out for Sunday after missing practice all week.
Running back Rashard Mendenhall, who tore the anterior cruciate ligament in his right knee during Pittsburgh's final game of the 2011 season, practiced all week but is listed as doubtful.
Fellow running back Jonathan Dwyer (foot) and defensive end Ziggy Hood (back) are both probable for Sunday.