Johnny Damon saw nearly a 100 point drop in OPS from his 2009 season with the Yankees to his 2010 season with the Tigers (.854 to .756). His home OPS had an even larger gap (.915 to .794).
Yankee Stadium played a big role in helping Damon to a successful 2009 season at the plate. While it ranked in the bottom half of stadiums in offensive park factor that year, Damon took advantage of the short porch in right, with all 17 of his home HRs finding their way there. The low offensive rating for Yankee Stadium was likely balanced by the Yankees' high-powered offense that hit equally well on the road; Yankee Stadium would jump up to 2nd in the league in offense in 2010 behind Coors Field.
While Comerica park ranked in the bottom half of the league in offensive park factor in 2010, unlike Yankee Stadium it is a much tougher park for left-handed hitters. It might not get any easier this season for Damon as Tropicana ranked dead last in park factor offense in 2010.