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05/09/2013 8:14 PM ET

Rookie Welker to serve long role in bullpen

NEW YORK -- Right-hander Duke Welker, recalled from Triple-A Indianapolis on Wednesday, will serve as the Pirates' long reliever as Jeanmar Gomez fills in for the injured James McDonald in the rotation. McDonald (2-2 in six starts) last pitched May 3 and developed discomfort in his right shoulder.

Gomez (2-0 with a 2.38 ERA in 22 2/3 innings as a starter and reliever) is to start Sunday against the Mets, opposite phenom Matt Harvey (4-0 in seven starts).

Marty Noble is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.