The home team struggles when the San Francisco Giants meet the Arizona Diamondbacks.
Judging by how the Giants fare when Madison Bumgarner pitches in Arizona, that trend could continue Sunday as the Diamondbacks look to avoid a sixth straight loss and a series sweep.
The visiting team is 10-2 in the season series after San Francisco (48-43) took the first two games of this set to extend its win streak to five. The Giants, who can post their first sweep at Chase Field since April 29-May 1, 2013, have captured 10 straight series in the desert.
''I don't have a way to explain it,'' manager Bruce Bochy said, ''but I do know our guys seem to like hitting here.''
Bumgarner (9-5, 3.33 ERA) also likes pitching there - going 3-0 with a 1.46 ERA in his last six starts at Arizona, with San Francisco winning all of them. He gave up one run in seven innings there on opening day April 6 to earn a 5-4 victory.
The left-hander is 1-1 with a 2.45 ERA in three 2015 starts against the Diamondbacks. Light-hitting Nick Ahmed is 3 for 6 in those games, Paul Goldschmidt is 3 for 9 with a homer and Chris Owings is hitless in 10 at-bats with five strikeouts.
Bumgarner, who worked a scoreless inning in Tuesday's All-Star Game, allowed two runs in 5 2-3 innings in a 15-2 rout of Philadelphia on July 10. His career ERA after the All-Star break is 2.75 compared to 3.34 before it.
Fellow southpaw and Arizona starter Patrick Corbin (1-1, 5.40) is 0-3 with a 4.99 ERA in his last five outings versus the Giants, who he hasn't faced since Sept. 6, 2013.
Corbin will make his third start since undergoing Tommy John surgery in March 2014. He surrendered four runs in five-plus innings last Saturday in a 4-2 loss at the New York Mets.
Hunter Pence is 9 for 19 with three homers against Corbin, Angel Pagan is 6 for 19 and Buster Posey is 6 for 20.
Those hitters have delivered in this series in which the Giants have scored 14 runs on 30 hits - 23 singles. Pence is 4 for 8 with three walks and three RBIs, Posey is 4 for 8 with five RBIs and Pagan is 3 for 10.
In addition, Joe Panik is 5 for 9 and Matt Duffy is 6 for 12, with that duo combining to score seven runs.
Posey will be behind the plate after catcher Andrew Susac left Saturday's 8-4 victory in the bottom of the fourth with a sprained right thumb. Bochy estimated Susac would be out a week to 10 days and said the Giants could bring up Hector Sanchez from Triple-A Sacramento to back up Posey.
Arizona (42-47) is enduring its longest slide since losing six straight Sept. 16-21.
"It's not good," manager Chip Hale said. "We're not playing crisp baseball, we're not doing the things we need to do to win. We have to play better."
Lefty-swinging David Peralta is 5 for 10 with a homer and three triples in this series. He often sits against left-handers and has never faced Bumgarner.