Steelers first-round pick Derrick Harmon said Saturday he initially feared the MCL sprain that took him out of the preseason finale was "serious."

Pittsburgh Steelers first-round rookie Derrick Harmon has broken his silence on his knee sprain, revealing what really happened on Thursday.

PITTSBURGH -- The Pittsburgh Steelers got a promising update on Derrick Harmon Saturday, and the rookie defensive tackle may only miss one game. Harmon suffered the injury on the play before his last play, which was the James Pierre interception.