He played college football for the Wisconsin Badgers and was selected by the San Francisco 49ers in the third round of the 2006 NFL draft.
Williams attended Normandy High School played with Laurence Maroney, (RB- New England Patriots) then transferred to Hazelwood East High School, the same high school as fellow and former NFL players Jamar Fletcher (CB – Detroit Lions), Scott Starks, (CB – Jacksonville Jaguars), Terrell Fletcher (former RB – San Diego Chargers), Bryan Fletcher (TE – Indianapolis Colts) and American sports agent Jason Fletcher of B&F Sports.
He was a two-time, second-team all-state and three-time, first-team all-conference selection.
He ranked seventh in Big Ten with a 21.6-yard kickoff return average.
Williams was named a second-team All-Big Ten selection as a senior in 2005, hauling in 59 passes for 1,095 yards (18.6 avg.)