By Teresa Varley
Steelers.com

Injuries continue to mount for the Steelers as it was made official on Tuesday that running back Verron Haynes and linebacker Arnold Harrison will be out for the remainder of the season after suffering ACL injuries and will be placed on injured reserve.

"We will make a roster move at some point, somewhere in the next couple of days," said head coach Bill Cowher. "We will see who we can pick up and help us win this week."

Haynes will have surgery on Wednesday and Harrison will undergo surgery once the swelling goes down.

The Steelers will have two roster spots available and could sign both a linebacker and a running back. Cowher did not indicate if running back Najeh Davenport would take over Haynes' role as the team's third down back or not.

"We will see what our options are," said Cowher. "I am not ready to make that decision today."

Also out for Sunday's game against the Denver Broncos are safety Mike Logan (hamstring), linebacker James Harrison (ankle), center Jeff Hartings (knee) and wide receiver/kick returner Willie Reid (foot).

Hartings suffered an MCL sprain against the Raiders and will not require surgery for the injury, but will be week-to-week.

Center Chukky Okobi came in for Hartings when he went down against the Raiders and turned in a good performance, including throwing blocks on Willie Parker's touchdown run.

"Chukky has been in this league," said Cowher. "When Jeff has gone down he has always stepped in and been a very consistent player. We're fortunate to have some depth at that position. I have no concerns with Chukky stepping in."

Listed as questionable for the game are defensive tackle Casey Hampton (hamstring) and linebacker Clark Haggans (ankle). Eight players are probable for Sunday, including: cornerback Deshea Townsend (quad), linebacker Larry Foote (shoulder), wide receiver Santonio Holmes (shoulder), offensive guard Chris Kemoeatu (ankle), fullback Dan Kreider (ankle), wide receiver Sean Morey (toe), safety Troy Polamalu (foot) and wide receiver Cedrick Wilson (groin).