Rene Rivera hit a go-ahead three-run homer in the fifth to follow his two-run double for a career-high five RBIs, single handedly backing Tyson Ross in the San Diego Padres' 6-4 victory against the San Francisco Giants on Monday night.San Francisco Giants' Michael Morse follows through on a two-run single against the San Diego Padres during the fourth inning of a baseball game Monday, April 28, 2014, in San Francisco.San Diego Padres second baseman Alexi Amarista, left, turns a double play over San Francisco Giants' Angel Pagan (16) on a ground ball from Hunter Pence during the first inning of a baseball game Monday, April 28, 2014, in San Francisco.San Diego Padres' Rene Rivera (44) is greeted at the plate by teammates Alexi Amarista, center left, and Tommy Medica, right, after Rivera's three-run home run against the San Francisco Giants during the fifth inning of a baseball game Monday, April 28, 2014, in San Francisco.San Francisco Giants starting pitcher Madison Bumgarner throws to the San Diego Padres during the first inning of a baseball game on Monday, April 28, 2014, in San Francisco.