Ryan Gene Williams is a former American football running back. He was drafted by the Arizona Cardinals in the second round of the 2011 NFL Draft. He played college football at Virginia Tech.

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Williams attended Stonewall Jackson High School in Manassas, Virginia. He was the starting tailback all four years. He finished with over 2,000 rushing yards, including 1,574 yards as a junior.

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As a freshman at Virginia Tech in 2008, Williams was redshirted. As a redshirt freshman in 2009, Williams took over as starting running back after starter Darren Evans suffered a season-ending ACL injury. Through thirteen games he rushed for 1,655 yards on 293 carries, scored 21 touchdowns, and broke multiple Virginia Tech and ACC rushing records in the process - including Virginia Tech's single season rushing yards record and the ACC single season touchdown record with 22 touchdowns. He began the 2010 season as a starter but injured his right hamstring in a game against East Carolina University and was out for three games before coming back against Duke.

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On January 9, 2011, it was announced that Williams will give up his final 2 years of NCAA eligibility to make himself available for the 2011 NFL Draft.

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Williams was selected by the Arizona Cardinals in the second round (38th overall) of the 2011 NFL Draft. On August 19, during a pre-season football game against the Green Bay Packers, Williams was injured early in the third quarter in his first run of the game, suffering a ruptured patella tendon in his right knee which cost him the entire 2011 season.

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On October 9, 2012, he was placed on the injured reserve list with a left shoulder injury, after playing in only 5 games. He was released on May 12, 2014.

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Williams signed as a free agent with the Dallas Cowboys on May 17, 2014. He was cut on August 30 and signed to the team's practice squad the following day.

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On June 28, 2015, Williams was waived/injured, and reverted to Dallas' injured reserve the next day. On September 15, he was released by the Cowboys with an injury settlement. Source.