Broncos to start Brock Osweiler ahead of injured Peyton Manning

Brock Osweiler will start at quarterback for the Denver Broncos this week, as Peyton Manning is dealing with a partially torn plantar fascia, according to sources.

Manning was pulled in Sunday's loss to the Chiefs in favor of Osweiler in the third quarter.

Osweiler was more effective than Manning, going 14-of-24 for 146 yards, a touchdown and an interception.

Although he set the NFL record for career passing yards, Manning was 5-of-20 for just 35 yards and four interceptions when he was removed from the game. He was sacked twice, and he fumbled.

Sources told ESPN that Manning has battled plantar fasciitis for weeks but is believed to have aggravated the injury against Indianapolis on Nov. 8, resulting in a partial tear of his plantar fascia. Almost always, a partial tear is more painful to play with than a complete tear.

Manning will not practice this week but instead will receive treatment and is expected to be re-evaluated next Monday.

With the Broncos playing the Bears this week, Manning will miss out on playing against his former coach John Fox, who his now the coach in Chicago.

"I've got nothing but great respect [for Manning]," Fox said Monday. "He's a great, great quarterback. He's arguably the best to play the game."

Information from ESPN.com's Jeff Legwold and Jeff Dickerson contributed to this report.