According to NFL Network's Ian Rapoport, Harmon could miss around a month.

Harmon sustained an MCL sprain and will be sidelined four to six weeks, NFL Network and the Pittsburgh Post-Gazette reported Friday.

Every report and update to this point has agreed that Harmon will likely miss at least one game while he recovers from his knee sprain, and fifth-rounder Yahya Black is the perfect replacement in his...