Pittsburgh Steelers defensive tackle Derrick Harmon knows he dodged a bullet but is "definitely frustrated" suffering a reported MCL sprain in Thursday's 19-10 win over the Carolina Panthers.

Steelers head coach Mike Tomlin said at his postgame press conference that Harmon suffered a knee sprain and would undergo further evaluation of the injury. Harmon returned to the sideline during the second half and the Steelers will be hoping that's a sign that he'll be able to get back on the field soon.

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