Ashby (forearm) is lined up to start Saturday's game in Pittsburgh, Adam McCalvy of MLB.com reports.
Ashby threw a bullpen session Wednesday that apparently went well, as the southpaw is slated to return from the 15-day injured list when first eligible Saturday. The 24-year-old struggled ahead of his absence, as he allowed 14 runs in 15 innings over his three starts prior to landing on the IL.