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Casey McGehee spent most of the 2012 season with the Pittsburgh Pirates before being dealt to the Yankees at the trade deadline. He had a subpar season offensively, batting just .217 with nine home runs, but has shown in the past that he can produce with the lumber.
His breakout season came with the Brewers in 2010, when he hit .285 with 23 home runs, 104 RBI and 38 doubles. The Brewers thought they had a star in the making, but he regressed the following season.
The 2010 season seems to be a bit of an aberration when you look at his 2009 and 2011 numbers, which were virtually identical. He hit about 15 home runs with 65 RBI in each of those two seasons. His playing time has fluctuated in recent years, but he still has some pop.
McGehee is not really an everyday player, although he could start if needed. He could provide a right-handed alternative to Ike Davis, as he has played both corner infield positions. He can provide power off the bench and give the Mets a much-needed right-handed power option, with Hairston likely gone.