He was a starter on the undefeated 2000 Oklahoma Sooners team that won the BCS National Championship, setting a school record for tackles for a loss by a defensive back with 12.

With Texas forced to begin their drive inside their own 5-yard line, the Sooners prepared to pressure UT quarterback Chris Simms.

The jarring and unexpected hit knocked the ball loose and into the hands of linebacker Teddy Lehman, who stepped into the endzone for a touchdown and sealed the game for Oklahoma.

[5] Williams was selected by the Dallas Cowboys in the first round with the eighth overall pick of the 2002 NFL draft after a trade with the Kansas City Chiefs.

With the arrival of Ken Hamlin from Seattle, Williams had the luxury to move closer to the line of scrimmage to blitz and cover short passes during nickel or dime situations.

In 2003, Williams with the mentoring of Woodson, enjoyed a stellar season and his first trip to the Pro Bowl as he was part of the Cowboys' number one ranked defense and helped lead the team to its first playoff game since 1999.

[11] With the right cornerback position stabilized by the free agent signing of Anthony Henry in 2005, Williams was once again able to play to his best strength by roaming closer to the line of scrimmage.

In early August 2006 the Dallas Cowboys signed Williams to a four-year contract extension worth $25.2 million to keep him with the team through the 2010 season.

[14] Teammate Greg Ellis, speaking on Sirius NFL Radio, said that Williams told him he felt like he did not fit in head coach Wade Phillips' defensive scheme.

On October 14, 2008, the Cowboys acquired wide receiver Roy E. Williams from the Detroit Lions,[17] making the two Pro Bowl players with identical names teammates.

[19] Key On August 24, 2011, Williams announced his retirement, taking a job as a sideline reporter for Oklahoma Sooners football games.

The Foundation's purpose is to help ensure low-income single mothers receive support, guidance, and assistance to enhance their quality of life.