As a senior, he averaged 15.7 points, 7.0 rebounds and 3.5 assists, leading his team to a 27–5 record and the state 4-A semifinals.

In 37 games as a senior, he averaged 10.6 points, 3.8 rebounds, 1.8 assists and 1.1 steals in 31.1 minutes and helped the Wolfpack reach the NCAA Tournament's Sweet 16.

[2][3][4] After going undrafted in the 2012 NBA draft, Williams signed with ETHA Engomis of the Cypriot League on July 24, 2012.

[5][6] After joining the Milwaukee Bucks for the 2014 NBA Summer League,[8] Williams signed with Giorgio Tesi Group Pistoia of the Italian Serie A on August 11, 2014.

[14] On September 19, he signed with the Dallas Mavericks,[4] but was waived on October 22 after appearing in five preseason games.

[15] On October 30, 2016, he was acquired by the Texas Legends of the NBA Development League as an affiliate player of the Mavericks.

[21] On July 31, 2018, the Minnesota Timberwolves signed Williams to a two-way contract with the Iowa Wolves of the NBA G League.

[30] Williams played with the senior United States national team at the 2017 FIBA AmeriCup, where he won a gold medal.