The White Sox recalled Bush from Triple-A Charlotte on Saturday and placed him on the 15-day injured list with a left tricep strain, Scott Merkin of MLB.com reports.
Chicago optioned Bush to Triple-A on Aug. 26, and despite making a one-inning start for Charlotte on Sept. 7, he'll revert to the big club's 15-day IL after suffering the injury in that outing. Given the timing of the injury, Bush is unlikely to be activated before the season ends Sept. 29. Bush made four starts for the White Sox prior to his demotion in late August, logging a 5.60 ERA and 2.04 WHIP while walking more batters (16) than he struck out (11) over 17.2 innings.