Pirates manager Derek Shelton said that Fleming will start Tuesday's game versus the Brewers, Noah Hiles of the Pittsburgh Post-Gazette reports.
He'll be filling the rotation spot that opened up when Jared Jones (lat) was placed on the injured list. Fleming will be pitching on two days' rest and hasn't gone more than two innings or exceeded 27 pitches across his last five appearances, so he's unlikely to work deep enough into Tuesday's start to qualify for a win.