Neil Walker scored on Clint Barmes' tiebreaking sacrifice fly in the eighth inning and the Pittsburgh Pirates rallied against Johan Santana and the New York Mets for a 5-4 victory Monday night.

Mike McKenry tied it with a two-run homer in the seventh off Santana and Walker made it all the way to third in the eighth when his long drive off Jon Rauch (3-3) glanced off the glove of center fielder Kirk Nieuwenhuis for an error and rolled to the wall. One batter later, Barmes hit a fly to right and Walker just beat the wide throw from Lucas Duda.

Jared Hughes (1-0) earned his first major league win in relief. Joel Hanrahan worked the ninth for his 10th save.

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