The Pirates optioned right-hander Steven Jackson to Triple-A in order to clear a roster spot for Taschner. Jackson, who had just joined the club Friday, made a scoreless 1 2/3-inning relief appearance that night.
Taschner had been on the DL with left hamstring tightness, and Wednesday is to be the first day the lefty is eligible to come off. He tossed one scoreless inning in a rehab appearance with Double-A Altoona on Monday after pitching an inning in relief Saturday.
"I felt really good," Taschner said. "The hamstring felt great."
Taschner tested out the hamstring in front of the Pirates' trainers Tuesday, after which the club made the decision that he was ready to return. In 17 1/3 innings this season, Taschner has allowed 12 runs on 21 hits and six walks. He has 15 strikeouts.
-- Jenifer Langosch