Xavier Williams (born January 18, 1992) is a former American football nose tackle.

Williams attended Grandview High School, where he was named a first-team all conference selection.

On March 13, 2018, the Cardinals placed an original round restricted free agent tender on Williams, which allows a player to negotiate a contract with another team, but their original team can match the offer, if they refuse, they receive a draft pick from the round the player was drafted in.

[4] On March 20, 2018, Williams received a contract offer from the Kansas City Chiefs giving the Cardinals a chance to match.

[8] Williams won Super Bowl LIV with the Chiefs after defeating the San Francisco 49ers 31–20.

During the game, Williams recovered a fumble lost by tight end Jack Doyle and later recorded his first sack of the season on Philip Rivers during the 31–27 loss.