Giants starters have a 2.95 ERA (and 4.14 FIP) against the Dodgers this season, with 46 strikeouts and 16 walks in 58 innings.
Dodgers starters have a 3.65 ERA (and 4.57 FIP) against the Giants, with 43 strikeouts and 24 walks in 56⅔ innings.
But three of those Giants starts were by Madison Bumgarner, who isn't pitching this weekend in San Francisco. Three of the Dodgers' 10 starts against San Francisco were by Paul Maholm, and he isn't starting this weekend either.
Dodgers relievers have a 2.92 ERA (and 2.81 FIP) against the Giants, with 43 strikeouts and 22 walks in 37 innings. Giants relief pitchers have a 2.06 ERA (and 3.45 FIP) against the Dodgers, with 28 strikeouts and eight walks in 35 innings.
In other words, Dodgers relievers have walked nearly as many (22) in 37 innings against San Francisco as the entire Giants staff has (24) in 93 innings against Los Angeles this season.
The Dodgers are 3-8 in extra-inning games this season, including 0-3 in extra-inning games against the Giants.
The Dodgers have famously not won a game when trailing after seven innings this season, 0-37 in those games. MLB as a whole has a .085 winning percentage in those situations, with the other 29 teams averaging just under four wins in those situations this season.
The Giants are 7-37 (.159) when trailing after seven innings this season, including a win on April 15 in San Francisco. The Dodgers led 2-1 after seven innings, and again after eight, but Kenley Jansen allowed a run in the ninth, one of his three blown saves this season, and San Francisco scored against Brandon League in the 12th to win on Jackie Robinson Day.
Santiago Casilla has pitched six scoreless innings this year against the Dodgers in five appearances. Yusmeiro Petit, who will start Sunday with Matt Cain on the shelf, has pitched 4⅔ scoreless innings in three appearances against Los Angeles this year.
Two Dodgers pitchers have pitched against the Giants in 2014 without allowing a run: Chris Perez, with four scoreless innings in five games, and Brian Wilson, with two scoreless appearances of an inning apiece.