Bailey (calf) has been ruled out for Sunday's contest against the Bills.
Considering Bailey didn't practice at all this week, it shouldn't come as a surprise that he will skip another game Sunday. This week marks his third straight absence, and the combo of Jaye Howard and Dontari Poe will likely anchor the middle and the defensive end spot left vacant by Bailey.
Ford (back) will not play in Sunday's game against the Bills.
Ford injured his back during warmups last Sunday, and it will cost him at least another week as well. Tamba Hali will continue to see the largest chunk of time at right outside linebacker, but Dezman Moses could be in line to spell him again Sunday should the veteran need rest.
Thomas (concussion) won't play Sunday against the Bills.
Having recorded 17 catches for 140 yards and a TD, to go along with nine carries for 34 yards and a rushing score in 10 games to date, the versatile Thomas is only of interest in deeper fantasy formats, though his absence does represent a hit to the Chiefs' Week 12 return game.
West (hamstring) is inactive for Sunday's game against the Bills.
With West inactive, Spencer Ware -- who had 96 yards and two touchdowns on 11 carries in relief of West in Week 11 - is slated to get the start at running back for the Chiefs on Sunday, while Knile Davis is active for the contest and thus an option to see complementary work.
Bray (knee) returned to practice Wednesday, Adam Teicher of ESPN reports.
Bray has been sidelined for the beginning of the 2015 season due to an ACL injury suffered while playing basketball. There's no indication of when he may return, but it's also unlikely he'll have a roster spot even when healthy.
Carrington left Sunday's loss to the Chiefs due to a knee injury and did not return, The Buffalo News reports.
The Bills may have some issues if Mario Williams can't return from a back injury this week, as Carrington was the one taking most of his snaps. The Buffalo defense simply hasn't performed this season in a manner that matched preseason expectations, and injuries like these to its constituents hasn't helped.
Williams is slated to undergo season-ending left knee surgery, ESPN.com reports.
Williams, who hasn't played since Oct. 18, has been slow to recover from a meniscus injury and will thus turn to a procedure that should enable him to return to the playing field well in advance of the 2016 season.