After decommitting from UCLA in June 2009, Williams quickly found a home in New Mexico in March 2010, and blossomed into a reliable player for Steve Alford’s Lobos squad. Williams scored a career-high 20 points in a 91–54 decision against Longwood University and posted his first collegiate double-double against Colorado, putting up 18 points and 11 assists in a 89–76 win. Williams also jockeyed for scoring leader for the Lobos, and consistently dished out the second most assists on the team (behind Dairese Gary). In addition, Williams both maintained one of the top six assist-to-turnover ratios (2.15 assists to turnovers) in the Mountain West Conference, and led the conference in three-point shooting percentage, both incredible feats for a true freshman. On March 7, 2011, Williams was selected as the Mountain West Conference Freshman of the Year after averaging 10.1 points per game and 3.7 assists per game. In his first collegiate postseason game, Williams led the Lobos in scoring with a 16-point performance against Colorado State in a 67–61 victory.

While still a tenth-grader at Los Osos HS, Williams verbally committed to the University of California, Los Angeles to play in 2010. While there was some skepticism concerning Williams early decision to attend UCLA, The Los Angeles Times reported that “[t]hose close to Williams say they are confident that his commitment will work out for both” Williams and UCLA. However, after UCLA pulled his scholarship in late July 2009 because of concerns of coach Ben Howland over Williams’s on court behavior while Howland was in attendance.

Despite Williams’s uncharacteristic output to start conference play, all was forgotten when he scored 46 points versus No. 22 Colorado State on Feb. 23, 2013. Williams accounted for more than half of the Lobos’ 91 points, and shot 12-of-16 from the floor, 10-of-13 from beyond the arc and converted 12-of-17 free throws. He also added five rebounds and four assists in 33 minutes, which made his point-per-minute average 1.4. His 10 three-pointers were a New Mexico and Mountain West record, and his 46 points tied for the third-highest scoring total in school history and fifth-best in conference history. He also set the school record in most points scored in a road game, and broke the Moby Arena scoring record of 44 points set by Portland State’s Freeman Williams on Nov. 29, 1975.

After going undrafted on 2014, he signed with Victoria Libertas Pesaro of the Lega Basket Serie A where he averaged 5.6 points per game. On January 29, 2015, he signed with Fileni Jesi of the Serie A2 Basket.

On September 28, 2016, Williams signed with the London Lightning of the National Basketball League of Canada; however, he left London on October 31 to sign with Raptors 905 of the NBA Development League.