He was also a professional basketball player, who spent his whole pro playing career with the German 2nd Division club QTSV.

Fleming played professional basketball from 1994 to 2000, with the German 2nd Division club QTSV, based in the city of Quakenbrück.

[7] Fleming was a member of the coaching staff of the San Antonio Spurs at the 2014 NBA Summer League.

[12] His last game as head coach of the German national team was a 72–84 loss to Spain in the quarterfinals of the 2017 European Championships.

On December 24, 2021, he was named as the Bulls' interim head coach as Donovan entered NBA's COVID-19 protocol.