Williams attended Mississippi Gulf Coast Community College from 2012 to 2013. In two years, he had 118 receptions for 2,028 yards and 26 touchdowns. Considered a five-star recruit by Rivals.com, Williams was listed as the No. 1 junior college prospect in 2014. He originally committed to Louisiana State University but changed to Auburn University. In his first game at Auburn, Williams had nine receptions for 154 yards and a touchdown. He was dismissed from Auburn on October 6, 2015 for a unidentified violation of team rules, later AL.com reported that Williams punched four people at a bar. It was also noted that he would no longer attend Auburn for academics. Williams in 2015 finished with 12 catches for 147 yards and 1 touchdown.
Professional career
Los Angeles Rams
On May 10, 2016, Williams signed a 3-year deal with the Los Angeles Rams as an undrafted free agent. On September 3, 2016, he was waived by the Rams as part of final roster cuts.
Edmonton Eskimos
Williams signed with the Edmonton Eskimos of the Canadian Football League before the 2017 season. Williams caught four passes for 110 yards and a touchdown against the BC Lions in his professional regular season debut. Williams went on to have a strong first season in the CFL, catching 46 passes for 508 yards with two touchdowns. Williams became a star player in the CFL in 2018, earning a Top Performers of the Month designation for the months of June and July and ultimately finished the season with the most receiving yards in the league with 1,579. On January 5, 2019, Williams was released by the Edmonton Eskimos in order to pursue NFL opportunities.
Buffalo Bills
On January 7, 2019, Williams signed with the Buffalo Bills of the NFL. Williams played in all four preseason games for the Bills, catching eight passes for 78 yards with two touchdowns. He was released during final roster cuts on August 31, 2019 and was signed to the practice squad the next day. On October 5, 2019, Williams was promoted to the active roster. He caught 4 passes for 29 yards and the game winning touchdown in a 14–7 Bills win over the Tennessee Titans on October 6, 2019. After suffering a shoulder injury against the Miami Dolphins in week 7, Williams was deactivated for the rest of the season until week 17 when the Bills rested numerous starters against the New York Jets, having already clinched a playoff berth. Williams caught six passes for 108 yards during the 13–6 loss. Williams was placed on the reserve/COVID-19 list by the Bills on July 29, 2020.
