Peyton Manning won't suit up against the Chicago Bears on Sunday.

Broncos coach Gary Kubiak is going with backup Brock Osweiler as he tries to get his 39-year-old quarterback healthy.

"I'm disappointed that I'm injured," a somber Manning said at his locker. "I'm disappointed in the game yesterday. I will try to take advantage of this week and try to get to feeling better and getting healthy."

Manning is dealing with a variety of ailments, including a torn plantar fascia in his foot, a person familiar with the situation told the Associated Press on Monday. He also has a sore right shoulder and a rib cage injury. He went for an MRI on his ribs Monday but didn't have the results.

Kubiak said he met with Manning for an hour Monday morning and told him of his decision — which Manning didn't like.

"I've never met a player who agreed to that," Kubiak said. "I mean, no, he's up there today and he wants to go, he wants to do everything he can for his football team and I knew that and I expected that.

"I tried to express to him my concern to getting him back to himself and feeling better and I think he understands the position I'm in and I sure as hell understand the type of person he is and the player he is."

Manning won't practice this week nor will he suit up against the Bears, when rookie Trevor Siemian will be Osweiler's backup, Kubiak said.

Kubiak wouldn't speculate how long Manning might be out, saying, "our focus is not going past today or the Chicago Bears. We're all in this week as a football team to get better and get ready to go play."

More QB concerns

Case Keenum will replace Nick Foles as the starting quarterback, beginning with Sunday's game at Baltimore, Rams coach Jeff Fisher said. Fisher said he had been over the last "four to five weeks" looking at the "big picture" in the production of the offense.

Foles went 17-for-36 for 200 yards and no touchdowns with an interception in Sunday's 37-13 loss at home to Chicago. He overthrew open receivers and other passes were poorly thrown. Foles has only one touchdown pass in his past four games.

•The Eagles likely will start Mark Sanchez at quarterback for Sunday's game against Tampa Bay. Sam Bradford suffered a concussion and a left (nonthrowing) shoulder injury Sunday against Miami, and coach Chip Kelly had no update on Bradford's status on Monday. "I feel very confident in Mark Sanchez," Kelly said. The NFL Network reported that Bradford is expected to miss the Bucs game and potentially the Thanksgiving Day game at Detroit, based on initial tests.

Blaine Gabbert will remain the 49ers' starting quarterback for Sunday's game at Seattle, though coach Jim Tomsula was noncommittal on what might happen the following week.

Etc.

•Saints coach Sean Payton said Rob Ryan has been fired as defensive coordinator and senior defensive assistant Dennis Allen will assume Ryan's duties. The move comes a day after the Saints allowed 526 yards in a 47-14 loss to the Redskins. The Saints rank last in the NFL in yards allowed per game with 424.7, yards allowed per play with 6.7 and points allowed per game with 31.5.

•Patriots receiver Julian Edelman has a broken bone in his left foot, according to multiple media reports. Coach Bill Belichick declined to comment on the severity of Edelman's injury.

•Giants receiver Victor Cruz, who has not played this season because of a knee injury, said he needs season-ending surgery to repair a tear in his left calf.

•The Titans placed receiver Justin Hunter (broken ankle) and cornerback Jason McCourty (groin) on injured reserve, ending their seasons.