It's not certain whether he'll be cleared in time to play for the Ants in their game against Iowa at 7:30 p.m. Friday at Memorial Coliseum. If not, he would likely be available for the team's games at the D-League Showcase next week in Reno, Nev.
The Ants traded Olek Czyz to Canton for a future draft pick to make room for Mitchell.
Mitchell finished second in the D-League in scoring last season, averaging 21.9 points per game and scored a league-high 49 points in one game. He also averaged 6.4 rebounds, 2.7 assists and 1.4 steals per game.
The Ants already have another player on the roster named Tony Mitchell, a forward on assignment from the Detroit Pistons.