Williams (calf) is listed as active for Sunday's game against the Titans.

With just nine tackles in four games to date, Williams is only an IDP consideration in the deepest of formats.

Williams (calf) is probable for Sunday's game against the Titans.

Williams should be good to go Sunday after missing practice Wednesday with a calf injury. The defensive stalwart hasn't been able to get to the quarterback effectively this year, recording zero sacks through four games, and as such shouldn't be counted on in IDP formats until he adapts to Rex Ryan's new defense.

Williams (calf) was limited at practice Thursday.

Williams didn't practice at all Wednesday, so it seems as if his health is improving at least slightly. However, until he adjusts to Rex Ryan's defense he will likely continue to disappoint in IDP formats.

Williams missed Wednesday's practice due to a calf injury.

Williams also seems to be having a tough time in Rex Ryan's new defense, as he's picked up just nine tackles and no sacks so far after logging 41 and 5.5 in 2014. He seems to be lined up out too wide for his liking at times, and until he gets a better handle on the new style of play, isn't worth owning in IDP formats.

Williams returned to practice Tuesday night, BuffaloBills.com reports. He'd been out with a thigh contusion.

Most of Buffalo's position units are injury-depleted, but the fierce defensive line - Williams, Mario Williams, Marcell Dareus, and Jerry Hughes - is in good shape health-wise as we get closer to the regular season.

Williams suffered a quad bruise during Monday's practice, ESPN.com reports.

Williams' injury is not expected to inhibit him for long, as coach Rex Ryan estimated he'll only need around three or four days to recover. With that in mind, the veteran should be back in action soon, but it wouldn't be surprising if he sits out Friday's preseason opener versus the Panthers anyway.

Williams will have his contract extended by one year and $10.5 million, ESPN.com reports.

This keeps the Pro Bowl defensive lineman locked up through 2017 if the Bills so choose, while also likely giving the team some extra wiggle room for the current free agency period in what's already been an aggressive offseason for the team. Marcell Dareus might be next on the contract front, at which point the Bills would have a fierce front four of Kyle Williams, Mario Williams, Dareus, and Jerry Hughes all locked up.

Williams missed Wednesday's practice due to an illness, Joe Buscaglia of WGR550.com reports.

We imagine the productive defensive tackle will be fine for Sunday's game against the Broncos, though a long plane flight and dealing with the thin air of Denver can't be all that fun for someone who's not feeling well, tough as Williams is.

Williams is being awarded an extra half-sack stemming from the Bills' win over the Jets in Week 8, BuffaloBills.com reports.

Upon further review, a sack that was shared by Kyle Williams and Mario Williams will now go solely to Kyle. This gives him 3.0 sacks on the season to go with 25 tackles and an interception.

Williams (knee) is listed as active for Sunday's game against the Vikings.

Williams' availability is key to the Bills' defensive line, but with 13 tackles and a sack in five games thus far, his IDP utility has been modest.

Williams (knee) practiced on a limited basis for the third straight day Friday but is listed as probable for Sunday's game against the Vikings.

The Bills have one of the best defensive line in the league and Minnesota has one of the worst offensive lines in football - with a rookie quarterback to boot. While we can't say which of Williams, Mario Williams, Marcell Dareus, or Jerry Hughes will have a big game this week, the opportunity is certainly there for one or more of them to put up a delicious stat line.

Williams (knee) practiced on a limited basis Wednesday.

Williams rallied to play in Week 6 against the Patriots, logging only two tackles. He's one of the NFL's best interior linemen, but the injury issues have caused his stats to fall far behind last year's pace, when he put up 68 tackles and 10.5 sacks. To date, he only has 13 tackles and one sack while playing in five games. That said, no one has been able to run the ball when Williams and Marcell Dareus are working the middle.

Williams (knee) is active for Sunday's game against the Patriots.

Williams, who missed last week due to a knee injury, returned to practice in a limited capacity Friday and has now been cleared to play in Sunday's Week 6 AFC North encounter. In two games versus New England last season, the veteran Williams recorded a combined nine tackles (three solo) and one sack.

Williams (knee) is listed as questionable for Sunday's game against the Patriots, wgr550.com reports.

Williams, who was inactive in Week 5, has a chance to play this weekend after practicing in a limited fashion again Friday, though per the report, the defensive tackle's status remains iffy in advance of Sunday's 1:00 ET kickoff.

Williams, who missed Buffalo's Week 5 win with a knee injury, was back at practice Wednesday, according to ESPN's Mike Rodak.

We won't know his level of participation or chances of playing this week until later, but if he's able to rally and play his presence - as one of the league's better interior linemen - would go a long way in trying to beat the Patriots this week. They're a team that has owned the Bills for more than a decade, yet the Bills feel they finally have a defense this season strong enough to make a run at the division.

Williams (knee) is inactive for Sunday's game against the Lions.�

With Williams out, Stefan Charles or Corbin Bryant (or a combo of the two) are in line to fill in for him at defensive tackle on Sunday.

Williams (knee) is listed as doubtful for Sunday's game against the Lions, the Bills' official site reports.

Per wgr550.com, if Williams is unable to suit up Sunday, either Stefan Charles or Corbin Bryant (or a combo of the two) would be in line to fill in for him at defensive tackle for the Bills this weekend.

Williams (knee) was not present at the portion of Friday's practice that was open to the media, ESPN's Mike Rodak reports.

If he misses all of Friday's practice, he will have sat out for three straight days, though coach Doug Marrone did note earlier in the week that Williams could play Sunday despite not practicing. The Bills will release their official injury designations later on Friday.

Williams (knee) did not practice for a second straight day Thursday, Joe Buscaglia of WGR550.com reports.

We're hearing rumblings that Williams could have to miss a few weeks, but we'll also note he has a history of playing through injuries and hasn't missed a game since 2011 even though he's had several ailments in that time. The fear, however, is that this one might be a bit worse.

Williams (knee) did not practice Wednesday.

We'll track Williams' status in the coming days, but coach Doug Marrone noted Wednesday that "Williams is one of those players who doesn't have to practice in order to play." Through four games, Williams has recorded 11 tackles, a sack and a pick, while holding down a starting DT slot in the Bills' defense.