Worley will help out in relief for the short-term; the Pirates' staff will soon determine the club's post-break rotation and Worley's role in it.
"We'll have Worley throw his regular bullpen [on Thursday], then see if he'll be available out of the bullpen Saturday and Sunday," manager Clint Hurdle said. "We still have to talk through how we'll break out in the second half. That's always a challenge with the four days down -- Who can provide us with the biggest impact as we kick off the second half?"
For the three-game set against the Reds, the Pirates will have left-handers Jeff Locke and Liriano bookending right-hander Charlie Morton.
Tom Singer is a reporter for MLB.com and writes an MLBlog Change for a Nickel. He can also be found on Twitter @Tom_Singer. This story was not subject to the approval of Major League Baseball or its clubs.