The White Sox optioned Banks to Triple-A Charlotte on Sunday.
Banks' demotion comes after he was lit up for four runs (two earned) on three walks and one hit over two innings out of the bullpen in Saturday's 8-0 loss to the Rangers. Since Banks wasn't going to be available to pitch in Sunday's series finale, the White Sox opted to move him off the 26-man active roster in favor of infielder Lenyn Sosa, who was recalled from Triple-A in a corresponding move.