After three consecutive All-Pro seasons (2004, 2005, 2006) in the NFL, Williams—at a massive 6′3″, 350 pounds—was described as a "textbook block-of-granite noseman" by Sports Illustrated′s Peter King in 2007.

A two-time All-Met selection at Archbishop Carroll High School in Washington, Williams played linebacker at 6′3″, 255 pounds.

[2] The highlight of his rookie season occurred on December 13, when he scored a touchdown on a 14-yard interception return against the Seattle Seahawks.

During the 2003 season, Williams posted totals of 33 tackles (24 solo), 1 sack, 1 forced fumble, and 1 pass deflection in 15 games.

In the 2005 season, Williams recorded 53 tackles (40 solo) and 4 pass deflections in 16 games and was named a Pro Bowl starter and was named 1st Team All-Pro by the Associated Press and The Sporting News, He Again Was Selected Chargers Defensive Player of the year And Lineman of the year for the Second Time in his Career.

He finished the 2006 season with 69 tackles (49 solo), 2 sacks, and 2 pass deflections in 16 games and was again named a Pro Bowl starter, as well as 1st Team All-Pro by the AP, The Sporting News, and the Football Writers Association of America, And Was selected Chargers Lineman of the Year for the Third time in his Career.

Williams finished 2008 with 56 tackles (46 solo), 1.5 sacks, and 3 pass deflections in 16 games, Williams Was Selected Chargers Defensive Player of the Year (For The Third Time In his Career), Lineman of the Year (For The fourth Time In His Career) And Co-Most Valuable Player With Philip Rivers.