Volstad allowed one hit and one walk while striking out one over a scoreless innings of relief in Thursday's 4-0 loss to the Twins.
Volstad was called up from Triple-A Charlotte earlier in the day, where he was a starter, and will work out of the White Sox's bullpen. The team's bullpen ranks 27th with a 5.35 ERA (3.65 FIP), so anyone that can get outs consistently has a shot at staying in Chicago. The Sox have already jettisoned Juan Minaya (9.00 ERA) and Gregory Infante (6.23 ERA) to Charlotte, giving Volstad his chance.