The White Sox recalled Schweitzer from Triple-A Charlotte on Saturday.
Since being sent down to Triple-A in mid-May, Schweitzer has posted a 7.71 ERA and 1.86 WHIP across 21 innings at Charlotte. Despite his poor performance, he'll return to the big leagues to give Chicago a bit of extra bullpen depth following David Sandlin's demotion. Schweitzer will likely be limited to low-leverage work as long as he's up with the White Sox.