Playing as a true freshman in 2006 for LSU, Williams rushed for a total of 436 yards on carries and 5 touchdowns.

At the 2007 Sugar Bowl versus Notre Dame Williams rushed for 107 yards on 14 attempts, scoring 2 touchdowns.

Williams was signed by the Washington Redskins as an undrafted free agent following the 2010 NFL draft.

Although he had no carries in the regular season, Williams was activated for the week 5 game against the Green Bay Packers to back up Ryan Torain, who started for the injured Clinton Portis.

[3] The Washington Redskins signed Williams after they cut Ryan Grant on October 23, 2012.