Pirates manager Clint Hurdle said Scahill is expected to throw a two-inning, 35-pitch game in the Gulf Coast League on Thursday.
Following that, Hurdle hopes to have Scahill back in Pittsburgh on Monday to look at the 28-year-old before the club heads to St. Louis for a three-game series.
Furthermore, Hurdle said Scahill should pitch three innings and around 50 pitches at Double-A Altoona in the middle of next week.
Scahill appeared in 24 games (26 innings) before hitting the DL, and he made the most of his opportunities. The righty totes a 2.08 ERA this season, while recording 22 strikeouts.
Scahill is in his first year with the Pirates after spending three years in Colorado, where he posted a 4.42 ERA.
John McGonigal is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.