After losing in the Sweet Sixteen of the 2011 NCAA Tournament, Singleton decided to leave FSU and declared himself eligible for the 2011 NBA draft.

[10] In June 2016, he signed in China with the Anhui Dragons for the 2016 NBL season,[11] where he won the championship and was named finals MVP.

[12] On July 1, 2016, Singleton signed a one-year deal (with a team option for a second year) with Greek club Panathinaikos.

[13] On July 17, 2018, Singleton signed a one-year deal with FC Barcelona Lassa of the Liga ACB and the EuroLeague.

[15] On June 21, 2023, he mutually parted ways with the Turkish powerhouse after three-and-a-half successful seasons.