Williams was released by the Chiefs on Tuesday, the Kansas City Star reports.
Williams was reportedly dealing with a physical condition that he didn't disclose prior to signing, missing the third of 10 voluntary sessions due to a stinger. He's now back on the open market and will look to land elsewhere.
Williams signed a contract with the Chiefs on Monday, Adam Caplan of NFL.com reports.
Williams is entering his fifth season in the league and will provide veteran depth at outside linebacker and special teams if he makes the team.
Chargers linebacker Tourek Williams, who left Thursday's preseason game with an injury and was walking on crutches afterward, suffered a broken foot and will need surgery, according to NFL.com.
By most accounts, Williams was one of the team's most improved players in training camp, so the injury is a big blow to the third-year pro, who had registered 31 tackles and one sack so far in the NFL.
The Chargers declared safety Jahleel Addae (hamstring), linebacker Tourek Williams, corner Chris Davis, wideout Dontrelle Inman, defensive tackle Ricardo Mathews, running back Branden Oliver and defensive tackle Ryan Carrethers inactive for Monday night's game at Arizona.
Chargers LB Donald Butler, OL Chad Rinehart, P Mike Scifres and LB Tourek Williams are active Week 10 against the Broncos.
All four players were listed as probable on the team's injury report. Scifres should be able to handle normal punting duties.
The Chargers have eight players on their Friday injury report, but only offensive lineman Mike Remmers (ankle) has been ruled out of the game Sunday against Denver. And only defensive end Lawrence Guy (toe), linebacker Jarret Johnson (hamstring) and wideout Eddie Royal (toe) are questionable.
The rest are probable. They are linebacker Donald Butler (groin), guard Chad Rinehart (toe), punter Mike Scifres (knee) and linebacker Tourek Williams (thumb).
The Chargers had eight players on their injured report, but only guard Chad Rinehart (toe) is inactive for the Sunday night game in Oakland.
The healthy inactives are quarterback Brad Sorensen, safety Brandon Taylor, wide receiver Lavelle Hawkins, linebacker Tourek Williams, tackle King Dunlap and defensive tackle Kwame Geathers.
Rookie inside linebacker Manti Te'o, who earlier was ruled out with a foot injury, heads the Chargers' list of inactives for Monday night's game against Houston. Also sitting out are safety Brandon Taylor (knee), quarterback Brad Sorensen, wideout Seyi Ajirotutu, guard Johnnie Troutman, linebacker Tourek Williams and defensive end Drake Nevis.