Pablo Sandoval went the opposite way for a walk-off home run to left field with one out in the 13th inning Tuesday night, sending the San Francisco Giants to their fifth extra-inning win in the last eight days, 5-4 over the visiting Chicago Cubs.

After the Cubs forced extra innings with single runs in the seventh and eighth to forge a 4-4 tie, neither team scored again until Sandoval, a switch-hitter batting left-handed, launched a Brad Brach (3-3) pitch barely over the glove of a leaping Robel Garcia for his 12th homer of the season.

Right-hander Sam Coonrod, promoted Monday from Triple-A, recorded his first major league win in just his fifth big-league appearance with a 1-2-3 top of the 13th, including strikeouts of Javier Baez and Kris Bryant.

The win was the Giants' 10th in their last 11 games and improved their record in extra innings to 10-2 after six straight victories.

The Cubs lost their third straight.

Giants ace Madison Bumgarner was in line for the win until the Cubs scored against the San Francisco bullpen in the top of the eighth to draw even at 4-4. Jason Heyward's two-out single drove home Bryant to tie the score.

Bumgarner was pulled with a 4-3 lead after seven innings, having allowed the three runs and six hits. He walked one and struck out seven.

Bryant drove in two of the three runs off Bumgarner with singles in the first and third innings.

Cubs starter Yu Darvish worked six innings, giving up four runs and six hits. He walked one and struck out six.

The Giants did a majority of their scoring in the fourth inning. Alex Dickerson hit his sixth home run of the season, a solo shot, and Kevin Pillar a two-run double in the three-run inning that gave San Francisco a 4-2 lead.

Dickerson and Pillar had two hits apiece for the Giants, who improved to 5-1 on their current seven-game homestand.

Bryant collected three hits, while Heyward, Baez and Victor Caratini had two apiece for the Cubs, who outhit the Giants 9-8.

--Field Level Media