Pittsburgh second-year inside linebacker Devin Bush sustained what coach Mike Tomlin called a “significant knee injury” in Pittsburgh’s 38-7 rout of the Browns on Sunday.

Bush, who had not missed a defensive snap all season, injured his left knee in the second quarter when he took an awkward step while attempting to break up a pass.

“Devin is a great player,” Steelers outside linebacker Bud Dupree said. “He’s one of the most underrated guys on the team, one of the fastest guys on the team, so anytime you lose somebody like that, it’s a big blow. But (Robert) Spillane came in and did well. He communicated well. Prayers up for Devin as he goes through recovery.”