By Jeremy Kahn

SAN FRANCISCO-Madison Bumgarner and Buster Posey did something in the San Francisco Giants series finale that was only twice before since moving to San Francisco in 1958.

Posey and Bumgarner hit grand slams in the fifth and sixth innings respectively, as the Giants defeated the Arizona Diamondbacks 8-4 before a crowd of 41,288 at AT&TPark, the 299th consecutive sellout at AT&TPark.

The duo are the first Giants teammates to hit two grand slams in the same game since Jeff Kent and Bill Mueller turned the trick on September 19, 1998 against the Los Angeles Dodgers, and the only previous that it occurred was on April 26, 1970, when Dick Dietz and Willie McCovey did it against the Montreal Expos.

Bumgarner is the first pitcher to two grand slams in the same season since Tony Cloninger of the Atlanta Braves hit two in the same game against the Giants at CandlestickPark on July 3, 1966.

The Diamondbacks got on the board in the top of the third inning, as Martin Prado picked up the second of three hits to score Nick Ahmed, who led off the inning with a single.

It was Bumgarner who got the ball rolling for the Giants in the bottom of the fifth inning, as he doubled off of eventual losing pitcher Vidal Nuno.

Hunter Pence then walked, after Gregor Blanco flyout to left field for the second out of the inning, Pablo Sandoval hit a single to load up the bases for Posey.

After taking a ball from Nuno, Posey launched a Nuno offering into the left field bleachers for his second career regular season grand slam and third of his career.

Prior to the grand slam off of Nuno, Posey last hit a regular grand slam on July 7, 2010 against the Milwaukee Brewers at MillerPark.

Posey hit a grand slam off of Mat Latos of the Cincinnati Reds at Great American Ballpark in Game Five of the 2012 National League Division Series that propelled the Giants in to the National League Championship Series versus the St. Louis Cardinals.

Joaquin Arias reaching second base after singling to center field, and then advancing to second base on a fielding error by Ender Inciarte, then Edire Adrianza reached first when Ahmed was unable to hold a popup.

Brandon Crawford then walked, and Bumgarner took the first pitch he saw from Matt Stites over the left field wall for his third home run of the season and second career grand slam.

Bumgarner and Posey are the first battery in Major League history to both hit grand slams in the same game, this according to the Elias Sports Bureau.

Posey is the first Giants batter to hit a grand slam while in the cleanup spot since Moises Alou on May 7, 2005 against the Washington Nationals, this according to David Feldman.

It was not just great offense on the day for the Giants, as they received great plays on defense on back-to-back plays in the top of the sixth inning.

Pence made a running catch into the seventh archway in right field off of a Paul Goldschmidt hit ball for the second out of the inning, following the Pence catch, Sandoval made a diving stab on a Mark Trumbo hit, regrouped and then threw to Arias at first base for the final out of the inning.

That was the second great defensive play by Pence on the day, as he made a terrific throw to Sandoval to get Inciarte going to third on a base hit by Prado in the first inning.

Brandon Belt was scratched from the lineup just prior to the start of the game due to back stiffness.

NOTES: Due to the fact that Bumgarner will be unable to pitch in the All-Star Game on Tuesday night at Target Field, Tim Hudson was named to the All-Star team as his replacement.

It will be the fourth All-Star Game for Hudson, and his first since 2010, when the game was played at Angel Stadium of Anaheim, a 3-1 victory, ending a 13-game winless streak for the Senior Circuit and gave home field advantage to the National League in the World Series.

Bruce Bochy set his pitching rotation for the first five games of the upcoming road trip to Miami for three games, and then onto Philadelphia for four games.

Bumgarner will go on Friday, then Hudson on Saturday, then Tim Lincecum will close out the series on Sunday in Miami. Pennsylvania native Ryan Vogelsong will open the series against the Phillies on Monday and then Matt Cain will pitch on Tuesday.