Karlos Williams

Buffalo Bills running back Karlos Williams (29) takes part in conditioning drills during NFL football training camp in Pittsford, N.Y., Sunday, July 31, 2016. (AP Photo/Bill Wippert)

(Associated Press)

Update: Buffalo cancelled Williams' work out on Thursday afternoon, but it's believed that it will be rescheduled.

The Buffalo Bills released running back Karlos Williams back in late August, but the team is at least considering a reunion with the running back.

Two sources have confirmed that Karlos Williams is scheduled to work out for the Bills on Friday. If he performs well, Buffalo may be interested in bringing him back into the fold.

LeSean McCoy has been Buffalo's workhorse back through the first four games of the season. Behind McCoy, Mike Gillislee, Reggie Bush and Jonathan Williams have combined a combined 48 yards rushing on 15 carries. It's clear that the team doesn't have confidence in any member of the trio to complement McCoy the way that Karlos Williams did in 2015.

In his rookie year, Karlos Williams rushed for 517 yards on 93 carries and added nine total touchdowns.