SAN FRANCISCO (AP) - Madison Bumgarner became the first pitcher in 48 years to hit two grand slams in a season, and Buster Posey also hit a slam Sunday that boosted the San Francisco Giants over the Arizona Diamondbacks 8-4.
Posey and Bumgarner became the first batterymates in major league history to hit grand slams in the same game.
Posey connected in the fifth and Bumgarner homered the next inning. Bumgarner also hit a slam on April 11 against Colorado.
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.
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.