ST. LOUIS This is no way to feel about a winning month. Despite blowing a two-run lead in the eighth inning and losing4-3 to the St. Louis Cardinals Tuesday night, the Giants were a technical success inMay. They finished it with a 16-12 record. But those gains came at a cost. Pablo Sandoval had hand surgeryMay 3. Mark DeRosa's wrist ruptured again. Most dear and dire,Buster Posey is out for the season with a shredded ankle.