Defensive tackle Derrick Harmon had to be carted off the field during Thursday’s preseason win over the Panthers after suffering a knee sprain. Harmon is expected to miss several weeks, according to the Pittsburgh Post-Gazette, and is set for an MRI exam on Friday.

Pittsburgh's top draft pick has been ruled out of tonight's preseason finale against Carolina. Here's what happened.

Pittsburgh Steelers first-round draft pick Derrick Harmon sprained a knee in the preseason finale against the Carolina Panthers and had to be carted to the locker room