Rookie Stephen Piscotty tripled and scored the go-ahead run on Mark Reynolds' groundout in the eighth inning, and the St. Louis Cardinals beat the San Francisco Giants 2-1 on Monday night. The run came a little too late for Michael Wacha, who allowed one run in seven innings with six strikeouts but missed a chance to become the majors' first 15-game winner. The right-hander faced the Giants for the first time since allowing an NL championship series-ending homer to Travis Ishikawa last fall in his first appearance of the postseason.