Steelers place veteran backup quarterback Bruce Gradkowski on IR

The Steelers knew veteran backup quarterback Bruce Gradkowski was going to miss significant time with a hamstring tear. As it turns out, it will be a season-ending injury. Via Gerry Dulac of the Pittsburgh Post-Gazette, to make room for waiver claim pickup Zach Mettenberger, the Steelers placed Bruce Gradkowski on injured reserve, where he’s now…