LAKE FOREST, Ill. -- Chicago Bears head coach John Fox announced on Monday that veteran safety Quintin Demps is out indefinitely after fracturing his left forearm in Sunday's 23-17 overtime victory against the Pittsburgh Steelers.

“Don't know yet [if Demps is going on injured reserve]…we’re still evaluating that and I'll keep you posted,” Fox said.

The Bears will likely turn to third-year safety Adrian Amos on Thursday night in Green Bay. Amos, who took over for Demps in the final quarter of the Steelers game, was a fixture in Chicago’s starting lineup in 2015-16 before losing his job to rookie Eddie Jackson over the summer.

“The good news is we've got guys that have been with us, whether it's Adrian, DeAndre Houston-Carson or Deon Bush, there are guys that are familiar with what we're doing. We feel good about guys stepping in," Fox said. "Obviously we don't want to see anybody get hurt or injured, but those other guys are worthy.”

Demps, 32, signed a three-year deal with the Bears that guaranteed him $5 million in 2017. He set a career-high with six interceptions for the Houston Texans last season.

Demps is the fourth starter the Bears have lost to injury. Cameron Meredith, Kevin White and Jerrell Freeman are the others.

In other injury news, Fox would not elaborate on center Hroniss Grasu's injured hand.

“He has a hand,” Fox said. “I’m not going to give you every detail.”

Grasu was on the field for just 14 snaps in Week 3 before he got hurt, forcing the Bears to switch Cody Whitehair back to center and play Bradley Sowell at left guard.

Since they play Thursday night, the Bears had to release an injury report on Monday.

In addition to Demps, inside linebacker Nick Kwiatkoski (chest) did not practice, while Grasu and Josh Sitton (ribs) were listed as limited.