A week ago, commenter MGM2, a proprioceptive researcher by trade, shared his observations of Manning's play, in which he detected a serious leg injury.
MGM2 has graciously permitted us to repost his comments here; we've rearranged them a bit, but you can see his original words here.
With the Broncos disputing Adam Schefter's initial report that Peyton Manning has a torn quad, the ESPN reporter has doubled down with more detail:
Specifically: Peyton Manning has a torn rectus femoris, which runs down center of thigh. Bruising was so severe it spread to back of his leg— Adam Schefter (@AdamSchefter) January 12, 2015
For more on the rectus femoris, head over to Wikipedia.
From Troy Renck:
Peyton Manning strained his right quadricep on Dec. 14 in San Diego, but it never advanced to a more serious injury, according to a team source...The Broncos say Manning played with a strain, not a full tear.
Of course, the Broncos don't want to open themselves up to a fine from the league for downplaying an injury to the NFL's marquee player.
Broncos QB Peyton Manning played Sunday’s Divisional Playoff loss and the past month of the season with a torn right quad, per two sources.— Adam Schefter (@AdamSchefter) January 12, 2015
Speaking on NFLN earlier this morning, Jeff Darlington said it's "unlikely" that Broncos linebacker Brandon Marshall will play today against Indianapolis. A Lisfranc injury kept Denver's leading tackler out of the last two games of the regular season, and it was thought that the bye would help him recover in time for Denver's first playoff game.
However, Sal Paolantonio has since reported on ESPN that Marshall experienced no setbacks on Saturday and is expected to play.
The Broncos placed Quanterus Smith (knee) on IR and promoted linebacker Shaq Barrett from the practice squad in his place. Smith graded out at -12.1 over 308 snaps in what was essentially a redshirt rookie season. Barrett was promoted for one game earlier in the season, but did not dress.
The bye week appears to have been just what the doctor ordered for the Broncos, who have several key players back at practice on Monday. Peyton Manning was held out of practice last week but is back on the field, while Brandon Marshall is practicing for the first time since suffering a Lisfranc injury three weeks ago.
Brandon Marshall (foot) has been ruled out for Sunday's game against Oakland; if the team is able to clinch a bye, the linebacker will have had four weeks of rest by the time the Broncos' first playoff game rolls around.
Emmanuel Sanders, T.J. Ward, and Paul Cornick are all questionable after being limited in Friday's practice, while all others are probable. That includes Ronnie Hillman, who is expected to see his first action since the first Oakland game (Week 10).
Nine Broncos were named to the Pro Bowl on Tuesday evening, the most of any team. Peyton Manning was selected for the 14th time, which ties him with Bruce Matthews for the most all-time. Chris Harris was selected for the first time, joined by two of his secondary mates in Aqib Talib and T.J. Ward.
The other players named are Von Miller, Demaryius Thomas, Ryan Clady, Julius Thomas, DeMarcus Ware. Emmanuel Sanders was named a second alternate, while C.J. Anderson is a sixth alternate. Notable omissions include Brandon Marshall and Terrance Knighton.
The Broncos opened two roster spots on Tuesday by placing linebacker Danny Trevathan on IR and waiving tight end Dominique Jones. Trevathan will undergo surgery to repair a patellar dislocation, the third injury in or around his left knee this season.
According to Troy Renck, Denver would like to bring Jones back to the practice squad. He was activated last week and dressed in place of Jacob Tamme, who is expected back this week.