Pirates manager Don Kelly said that Bachar will start Sunday's game against the Red Sox at PNC Park, Colin Beazley of the Pittsburgh Post-Gazette reports.
Paul Skenes had been slated to take the hill for the series finale with Boston, but the Pirates will instead push their struggling ace back a few days in the pitching schedule and insert Bachar as a spot starter. The 31-year-old right-hander previously made four starts for the Marlins but has made all four of his appearances out of the bullpen since the Pirates acquired him Aug. 3. Bachar will be pitching on three days' rest after covering three innings and tossing 46 pitches in relief during Wednesday's 8-2 loss to Miami. He'll be operating with a limited pitch count Sunday and is unlikely to work deep enough into the contest to qualify for a win.