Ashby will start Saturday's game against the Marlins.
Ashby worked out of the bullpen during Sunday's loss to the Reds and allowed a run on two hits and two walks while failing to record a strikeout in 1.2 innings. He hasn't tossed more than 41 pitches in either of his two appearances since returning from the injured list, so it's possible that he won't be able to handle a full workload as Saturday's starter.