Harmon has been expected to be a potential starter right off the bat for the Steelers. However, he went down with an injury that was originally diagnosed as an MCL sprain. That diagnosis would have come with a potential 4-6 week timetable for return.

Pittsburgh Steelers rookie Derrick Harmon has avoided a serious injury after his knee bent awkwardly during a preseason game against Carolina

Pittsburgh Steelers first-round pick Derrick Harmon has sustained a medial collateral ligament (MCL) sprain and is expected to be sidelined, sources confirmed to ESPN.