Mitchell agreed to a contract Wednesday with Santeros de Aguada of the Puerto Rican Baloncesto Superior Nacional, Nicola Lupo of Sportando reports.
Mitchell concluded the 2017-18 season by averaging 18.6 points, 5.9 rebounds and 3.8 assists over 44 games played with Sioux Falls.
Mitchell missed Tuesday's 121-116 loss to Iowa due to personal reasons.
Mitchell had 28 points (11-22 FG, 2-8 3Pt, 4-5 FT), six rebounds, five assists, three blocks and two steals during Wednesday's blowout 140-112 loss at the Hustle.
Mitchell was waived by the Warriors on Monday, Rusty Simmons of the San Francisco Chronicle reports.
Mitchell has agreed to a free-agent deal with the Warriors, Yahoo's Shams Charania reports.
The Pistons sent Tony Mithcell to the D-League on Thursday.
Mitchell has appeared in just 10 games and almost all of his minutes have come in garbage time this season.
Pistons sign rookie forward Tony Mitchell.
Mitchell was the 37th overall pick in June's draft. He's more of defensive player at this point but could prove to be a bit of a steal for the Pistons in the coming years.