SAN FRANCISCO — The Giants played .500 ball against the rest of the division last season, which came back to haunt them when it was all said and done. The Dodgers had eight more divisional wins than the Giants and won the National League West by eight games.The math has shifted this year, in large part because the Giants continue to beat up on the worst team in the West. After Wednesday's 4-3 walk-off win, the Giants are 9-0 against the Padres this season and have won 13 of their last 14 overall. CHP Investigating Another East Bay Freeway Shooting Jake Peavy took a shutout into the seventh thanks to a first-inning play from Kelby Tomlinson. The late addition to the lineup in left field hosed Yangervis Solarte at the plate to save a run. A double play shortened the second inning and Peavy stranded runners in each of the next two. He retired eight straight at one point before a double and single put a run on the board and ended his day.The Giants took an early lead with some small-ball. Brandon Crawford singled in the second, alertly took third when Jarrett Parker ground out against the shift, and walked home on Tomlinson's single. Matt Duffy's RBI single brought a second run...