According to the Broncos, Derek Wolfe experienced seizure-like symptoms on the team's bus ride to DIA on Friday, and is recovering in an area hospital.
The team had announced earlier on Saturday that Wolfe had been ruled out, but no details had been given regarding his condition.
While playing professional football isn't great for anyone's general well-being, Wolfe's 2013 has been notably difficult healthwise.
Knowshon Moreno, Champ Bailey, and Omar Bolden were upgraded to full practice participants Friday, and are listed as probable for Sunday's game at Arrowhead.
Dominique Rodgers-Cromartie and Julius Thomas were again limited, and are questionable, as is Derek Wolfe, who fell ill on Friday and did not travel with the team to Kansas City.
According to the DP, Wolfe will be ruled out if he's unable to travel by sometime on Saturday afternoon.
John Fox made a surprise visit to practice at Dove Valley on Thursday, and while there, shared some unexpected and wonderful news.
Next Monday - and four weeks after having undergone surgery to replace a defective aortic valve - Fox will reassume his position as head coach.
The Broncos host the Titans in Week 14; it has not yet been determined whether Fox will coach from the sideline or up in the booth.
As expected, the Broncos have placed Kevin Vickerson on IR and replaced him with a veteran free agent.
Denver has signed DT Sione Fua (6-1, 310), a third-year player drafted by Carolina in the third round (97th overall) of the 2011 Draft.
The Stanford alum has 22 total tackles and one forced fumble in 27 career games (12 starts).
According to Adam Schefter, Broncos DT Kevin Vickerson suffered a dislocated hip on Sunday night. While the injury will not require surgery, it will keep Big Vick out for at least six weeks, and may end his season.
Vickerson has played 403 snaps in 11 games (consistently 35-40 per game), grading out at minus-6.4 overall. PFF credits him with one sack, one QB hit, 14 hurries, two batted passes, 20 total tackles, and 17 stops.
According to Jack Del Rio, the Broncos expect to have both Julius Thomas and Champ Bailey back on the field for the rematch with the Chiefs at Arrowhead.
He says the team is still awaiting the MRI results on the injured hip of Kevin Vickerson, while Knowshon Moreno's ankle is merely bruised, making him day-to-day, along with Dominique Rodgers-Cromartie.
Combined with the injury to Chiefs LB Justin Houston, these are extremely positive developments for a team with a chance at a sweep of Kansas City on Sunday.
Especially for Kansas City, a bunch of Monday MRIs could go a long way toward determining the upcoming Broncos/Chiefs rematch at Arrowhead, and thus, the AFCW.
After the Chiefs fell at home to the Chargers, LB Tamba Hali was carted off the field with a knee injury and left the stadium on crutches, while LB Justin Houston departed with his right arm in a sling.
The two players, who have combined for 20 of the team's 37 sacks, will each undergo an MRI on Monday.
According to Mike Klis, John Fox's recovery from open heart surgery is going well enough that the Broncos head coach will return to Denver on Wednesday.
It's unclear when Fox will return to coaching the team, or where he is relative to expectations, but it's great to hear he's progressing.
All signs this week had pointed to Wes Welker making the trip to New England to face his former team.
Indeed, he's listed as probable after participating in full during Friday's practice, but Jack Del Rio says there's no question whether Welker will play.
Peyton Manning was a full participant, while Wes Welker, Julius Thomas, and Joel Dreessen made limited returns; Champ Bailey was again limited.