But whether or not he gets in for a few plays, the Chiefs have plans for Williams as soon as he's ready to play.
The Chiefs have been looking for a boost for their sluggish passing game and hope Williams, who was claimed off waivers from San Francisco this week, can eventually provide some help.
Kansas City (9-0) and the Broncos (8-1) meet again Dec. 1 in Kansas City.
"He can be explosive with the ball in his hands,'' offensive coordinator Doug Pederson said. "We know his ability to block. He's a tough, physical kid with some speed. We've just got to get him in practice and see what he can do in situations where he has a chance to make a play.''
Williams played mostly as a slot receiver with the 49ers, but the Chiefs may look immediately for help from Williams as an outside receiver. The starters are veterans Dwayne Bowe and Donnie Avery, who have combined for just 60 catches and three touchdowns.
Williams also returned punts and kickoffs for the 49ers. The Chiefs are seemingly set with Quintin Demps returning kickoffs and Dexter McCluster returning punts, but Williams could serve as insurance.
"We plan on using him [as] a backup punt returner, a backup kick returner,'' special teams coordinator Dave Toub said. "The good thing is, there's not a lot of drop off. If something was to happen to one of our guys, we have a guy who's a viable candidate to be able to play for us.''
Williams arrived in Kansas City late Wednesday night, and his first practice was Thursday. But he played in a similar offensive system with San Francisco, where his quarterback until this season was Alex Smith, who is now with the Chiefs.
"It's a quick turnaround but we've got a big one on Sunday,'' Williams said. "Hopefully I'll be able to get in there and make something happen.''