Don, don't feel bad.
Commenter Don mentioned that the forgot the Marlins/Mets game Wednesday night was being played in Puerto Rico rather than Miami. I've made that mistake with football games before, though never with baseball games. Moreover, the location-specific HFA in baseball is basically a non-factor. Almost the entirety of HFA comes from the advantage of batting in the bottom of innings. So you made a mistake, but it wasn't even a rounding error.
I can beat the game...
New York (NL)/Washington over 8.5 (+100), one unit. I really think so very little of Luis Atilano, and the Nationals' lineup core has enough power to threaten Niese. Marginal play.
Florida -115, 1.5 units. Josh Johnson at -115 is sweet. However, Kris Medlen is tough enough on righties, of which the Marlins have many.
Cleveland +106, one unit. Gio Gonzalez is a product of his home park.
Milwaukee +157, one unit. Mostly a fade of Jamie Garcia, although the absence of Ryan Ludwick makes the Cards a bit more attractive.
Los Angeles (NL) -120, 1.5 units. Straight fade of Edwin Jackson off the 149 pitches.