Pittsburgh Steelers rookie defensive lineman Derrick Harmon could make his NFL debut in Sunday's Week 3 game against the New England Steelers after being listed as "questionable" on Friday's injury report. Harmon, who has been sidelined for two games while recovering from a preseason knee injury, was a full participant in Friday's practice. He could see limited snaps Sunday if he is cleared to play against the Patriots, defensive coordinator Teryl Austin said Thursday. His regular-season NFL debut was delayed when he suffered a sprained right knee in the Steelers' Aug. 21 preseason finale against the Carolina Panthers. The Steelers didn't place Harmon on IR, indicating hope for a return sometime before Week 5.