The Steelers will be without a starter on both sides of the ball for the second straight week when they travel to Denver to take on the Broncos at Broncos Stadium at Mile High.

Marcus Gilbert will miss his fifth straight game, ruled out with a knee injury, while Stephon Tuitt will miss his second straight game with an elbow injury. Both players were held out of practice all week.

With Gilbert out, Matt Feiler has started four straight games, but he too has been hit by the injury bug. Feiler suffered a pectoral injury against the Jaguars last week but played through it. He didn't practice on Wednesday, was limited on Thursday and Friday and is questionable this week.

"I am feeling good," said Feiler. "Taking it slow. Just feeling it out. I feel good. We're taking it day-by-day, seeing how it feels and resting it."

If Feiler can't go, the Steelers will rely on rookie Chukwuma Okorafor, who has seen playing time lately as a tackle eligible/blocking tight end but hasn't had work with the starting offensive line.

"He is a big, strong young guy," said offensive coordinator Randy Fichtner. "I say young because he is. He's got his footing. He's had to play. We have put him in positions to play. It's not going to be foreign to him in the huddle with Ben (Roethlisberger). He has been in there. He now has a bigger role he will have to be ready to fill."

Okorafor said the playing time he has gotten so far will definitely be an asset if he has to start on Sunday, especially with the task of blocking pass rushers Von Miller and Bradley Chubb.

"It would be different walking in now, not having played at all, trying to block Von or Chubb," said Okorafor. "This has helped. It's still going to be a huge challenge. I just have to do my job."

Okorafor has credited David DeCastro with helping him, something the Pro Bowl guard said is just what teammates do for each other.

"You have to," said DeCastro. "Naturally you just do, make sure he is on top of it. It's a lot. Anything we can do to help him. He keeps growing. That is how it goes in the NFL."

With Tuitt out both Tyson Alualu and Daniel McCullers will see extended playing time.

"I want to go out there and be accountable and help the defense as much as I can," said McCullers. "I just want to try and do my job. The more playing time I have been getting, it helps a lot. It helps getting the playing time and showing coach what I can do."

Anthony Chickillo, who suffered an ankle injury late in the Jacksonville game, was a full participant all week.

The full participation and status report is below.

Pittsburgh Steelers Participation/Injury Report, Week 12

Game Status
OT Matt Feiler (Pectoral) - Questionable
OT Marcus Gilbert (Knee) - Out
DE Stephon Tuitt (Elbow) - Out

Friday, 11/23
QB Ben Roethlisberger (Coach's Decision) - Full
CB Joe Haden (Coach's Decision) - Full
C Maurkice Pouncey (Coach's Decision) - Full
LB Anthony Chickillo (Ankle) - Full|
OT Matt Feiler (Pectoral) - Limited
OT Ramon Foster - (Coach's Decision) - Full
OT Marcus Gilbert (Knee) - DNP
DE Stephon Tuitt (Elbow) - DNP

Thursday, 11/22
QB Ben Roethlisberger (Coach's Decision) - Full
CB Joe Haden (Coach's Decision) - Full
C Maurkice Pouncey (Coach's Decision) - Full
LB Anthony Chickillo (Ankle) - Full
OT Matt Feiler (Pectoral) - Limited
OT Ramon Foster - (Coach's Decision) - DNP
OT Marcus Gilbert (Knee) - DNP
DE Stephon Tuitt (Elbow) - DNP

Wednesday, 11/21
QB Ben Roethlisberger (Coach's Decision) - DNP
CB Joe Haden (Coach's Decision) - DNP
C Maurkice Pouncey (Coach's Decision) - DNP
LB Anthony Chickillo (Ankle) - Full
OT Matt Feiler (Pectoral) - DNP
OT Marcus Gilbert (Knee) - DNP
DE Stephon Tuitt (Elbow) - DNP

Denver Broncos Participation/Injury Report, Week 12

Game Status
ILB Brandon Marshall (Knee) - Out
CB Bradley Roby (Concussion) - Questionable
S Dymonte Thomas (Ankle) - Out

Friday, 11/23
ILB Brandon Marshall (Knee) - DNP
CB Bradley Roby (Concussion) - Full
S Dymonte Thomas (Ankle) - Limited
WR DaeSean Hamilton (Knee) - Full
NT Domata Peko Sr. (NIR) - Full
NT Shelby Harris (NIR) - DNP

Thursday, 11/22
ILB Brandon Marshall (Knee) - DNP
CB Bradley Roby (Concussion) - Limited
S Dymonte Thomas (Ankle) - DNP
WR DaeSean Hamilton (Knee) - Full
NT Domata Peko Sr. (NIR) - DNP

Wednesday, 11/21
ILB Brandon Marshall (Knee) - DNP
CB Bradley Roby (Concussion) - DNP
S Dymonte Thomas (Ankle) - DNP
WR DaeSean Hamilton (Knee) - Limited