"Fifteen to 20 is a gray area," Hurdle said. "Twenty, we're done."
Hurdle said Kent Tekulve, a Pirates reliever from 1974-85 and current broadcaster, advised the pitchers not to ice their arms after Game 1. The traditional doubleheader allows them to do that as opposed to waiting several hours between games.
"Ice starts the healing process," Hurdle said. "That's why you just have them pitch, keep them hot and keep them going."
Hurdle also said righty Vic Black, who allowed a run and three hits on 29 pitches Monday night and is the organization's No. 17 prospect, would be available Tuesday. The 25-year-old has made two appearances since being called up on July 23.
"Just because he's a big, strong young man and he's done it before," Hurdle said. "We'll see how this plays out. These are always interesting."
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. Steven Petrella is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.