The scheduled starters are Charlie Morton and Gerrit Cole, so Cumpton would probably just serve as an extra arm out of the bullpen. He was originally scheduled to be the starter in tomorrow's game with Indianapolis.
Zangrilli also says that Nevin Ashley is coming up, and that he could be replacing Tony Sanchez, who is presumed injured.
The Pirates can bring up Ashley as a precaution without adding him to the roster. If Sanchez was injured, they'd have Ashley in town, and could add him before the game. If Sanchez is fine, then they don't need to do anything with Ashley.
Ashley isn't on the 40-man roster, but the Pirate...
Tim is the owner and editor in chief of Pirates Prospects. He started the site in January 2009, and turned it into his full time job during the 2011 season. Prior to starting Pirates Prospects, Tim worked with AccuScore.com, providing MLB, NHL, and NFL coverage to various national media outlets, including ESPN Insider, USA Today, Yahoo Sports, and the Wall Street Journal. He also writes the annual Prospect Guide, which is sold through the site. Tim lives in Bradenton, where he provides live coverage all year of Spring Training, mini camp, instructs, the Bradenton Marauders, and the GCL Pirates.