No word on what the corresponding move would be. The two possibilities that come to mind would be Neil Walker to the disabled list, or releasing John McDonald. I feel it's more of the former than the latter.
Charlie Wilmoth wrote this morning about how Mercer deserves to be on the 25-man roster.
UPDATE 4:45 PM: The Pirates have announced that Neil Walker has been placed on the 15-day DL, and Jordy Mercer has been recalled. Walker's placement was retroactive April 27th....
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.