Jhonny Peralta homered and singled home the go-ahead run in the eighth inning, leading the St. Louis Cardinals to a 4-2 victory over the Los Angeles Dodgers on Sunday night. Dodgers right fielder Yasiel Puig, playing his second game after missing 39 because of a strained left hamstring, committed a costly fielding error during the Cards' three-run rally after Matt Carpenter drew a leadoff walk from reliever Adam Liberatore. Matt Holliday greeted Juan Nicasio (1-2) with a double down the right-field line and the ball got past Puig, allowing pinch-runner Peter Bourjos to score the tying run and Holliday to take third.