SAN FRANCISCO — Madison Bumgarner was so enthused by seeing Buster Posey hit a grand slam, he did the same thing the next inning.
Bumgarner became the first pitcher in 48 years to hit two grand slams in a season, and Posey also hit a slam Sunday that boosted the San Francisco Giants over the Arizona Diamondbacks 8-4.
“Everybody was excited to get a big hit like that,” Bumgarner said of Posey. “That put us back in the lead. That’s what big-time players do and he’s a good one already.”
Posey and Bumgarner became the first batterymates in major league history to hit grand slams in the same game.
“That’s pretty cool,” Bumgarner said. “This game is full of strange statistics. It seems like there is a first every day. It’s crazy to get that many opportunities as a pitcher.”
A double by Bumgarner helped set up Posey’s slam in the fifth. Bumgarner homered the next inning — he also hit a slam on April 11 against Colorado.
“All we could do was shake our heads,” Posey said. “I was asking Rags (Dave Righetti) if any pitcher had ever hit two slams in the same season.”
The last pitcher to launch two slams in a season was Tony Cloninger, who hit both in the same game for Atlanta on July 3, 1966, against the Giants at Candlestick Park.
Diamondbacks catcher Tuffy Gosewisch came out to talk to Matt Stites about how they were going to pitch to Bumgarner.
“Everybody knows he’s a good hitter,” Gosewisch said. “I wanted to go first pitch fastball down and away and it just ran back over the plate.”
Bumgarner (10-7) threw 6 1-3 innings to end a personal three-game losing streak. He gave up four runs and 10 hits, striking out five.
Vidal Nuno (0-1) allowed four runs and six hits in five innings during his second start with Arizona.
The Giants finished the first half by winning five of nine. That followed a stretch of 18 losses in 23 games that cost them their lead in the NL West.