MIAMI - Rudy Seanez intentionally walked Barry Bonds to load the bases in the 10th inning, then couldn't throw a strike when he tried.
Pinch-hitter A.J. Pierzynski walked on four pitches to force in the tiebreaking run, and the Giants beat the Marlins 6-5 on Wednesday night.
San Francisco's Pedro Feliz hit a two-run homer off Guillermo Mota to tie it at 5 in the eighth.
The winning rally in the 10th began when Ray Durham reached with one out on an infield single off Seanez. Deivi Cruz also singled for his third hit, and after Feliz popped out, Bonds was walked intentionally for the third time to load the bases.
Pierzynski forced in the run when ball four was in the dirt.
The Giants remained one game behind wild-card leader Chicago. The Marlins, who had won their past three, fell six back.
Florida lost despite a big night by Juan Pierre. He went 3-for-4 with a walk, stole three bases, scored twice and drove in two.
San Francisco tied it when Feliz hit his 18th homer after Cruz reached on an infield single. Cruz hit his fifth homer leading off the sixth against Dontrelle Willis, who gave up three runs, two earned, in six innings.
CUBS 4, BREWERS 2: Corey Patterson delivered after a disputed call went Chicago's way, and the Cubs sent Milwaukee out of Wrigley Field with its eighth straight loss.
Patterson hit a two-out, two-run homer in the ninth, capping a rally that began on a controversial leadoff double by Mark Grudzielanek.
Grudzielanek opened the ninth with a fly ball down the rightfield line near the wall and took third when Brady Clark's relay went past second for an error. First-base umpire Mark Wegner ruled it fair, and replays were inconclusive.
"I'd say it was at least one baseball foul. I saw what I saw. I saw it foul," Clark said.
Wegner disagreed, during the game and after.
"I just watched the replay and it showed it fair, too. It hit the line," Wegner said. "He (Yost) thought his player thought it was foul, but that's why I'm on the line, and I got a good look at it, so fair ball."
EXPOS 6, DODGERS 3: Brian Schneider hit a three-run homer and Montreal connected four times off Jose Lima.
West-leading Los Angeles fell to 1-2 on its season-high 13-game road trip. Expos manager Frank Robinson got his 900th career victory.
Brad Wilkerson hit a leadoff home run in the first and Tony Batista and Juan Rivera also homered off Lima, who lost for the first time in 11 starts since Anaheim beat him 13-0 on June 25.
PADRES 4, METS 0: Brian Lawrence escaped a bases-loaded jam in the first and allowed four hits the rest of the way for visiting San Diego. Lawrence pitched a six-hitter for his second straight complete game, one night after David Wells came within an out of a shutout against New York. The Mets have lost four in a row, the past three to the Padres.
BRAVES 8, ROCKIES 1: Chipper Jones homered twice and matched his career high with five RBIs, leading host Atlanta to its 19th win in 27 games. Eli Marrero also homered off Jeff Francis, who gave up six hits in his major-league debut, three of them homers. Jones, who was slowed by a hamstring injury and hit .214 with 12 homers and 34 RBIs before the All-Star break, is batting .346 (28-for-81) in August with 10 homers and 25 RBIs.
CARDINALS 6, REDS 5: Albert Pujols and Jim Edmonds hit two-run homers and pinch runner Reggie Sanders scored the go-ahead run in the ninth on Joe Valentine's wild pitch to lead St. Louis. The Cardinals, who overcame a 5-2 deficit, improved the majors' best road record to 41-20 and beat Cincinnati for the 14th time in 18 games this season.
ASTROS 7, PHILLIES 4: Jeff Kent hit a tiebreaking three-run homer in the eighth and host Houston swept the season series from Philadelphia for the first time. Kent also connected in the second, and Carlos Beltran and Morgan Ensberg homered as the Astros finished 6-0 against the Phillies and won for the eighth time in 10 games overall.
PIRATES 2, D'BACKS 1: Jack Wilson and Jason Bay hit consecutive home runs off Randy Johnson in the seventh to lift host Pittsburgh. Johnson was working on a one-hitter and had retired 17 in a row before Wilson, who had a one-out single in the first, led off the seventh with his 10th homer, a career best. Bay followed with his 19th.
