Pitchers: Zack Greinke faces one of his tougher tests of the season against the Marlins, who rank fifth in team OPS on the season and third during the month of May. Greinke has allowed five home runs in his past four starts, and the Marlins rank second in homers in 2008. Greinke is a risky proposition, at least for a pitcher with a sub-2.00 ERA. …