Michael Wacha held the Giants off the board through six innings as the Cardinals blanked the Giants 2-0 at Busch Stadium. Wacha improved to 4-and-3 but left after six frames due to a 51-minute weather delay. Trevor Rosenthal locked down his 16th save for the Cards who snapped a three game skid. Oscar Taveras went deep in his Major League debut and Jhonny Peralta drove in the other run in the win. Yusmeiro Petit took the loss filling in for Matt Cain who hit the disabled list Saturday morning. The Giants were held to three hits and ended their four game winning streak.