SAN FRANCISCO -- Barry Bonds, or at least a guy pretending to be him, came back to haunt the San Francisco Giants on Monday night.

Right-hander Gerrit Cole became the third eight-game winner in the major leagues, benefitting from a replay reversal on fan interference in the eighth inning of the Pittsburgh Pirates' 4-3 victory.

Second baseman Neil Walker broke a 2-2 tie with a two-run double in a three-run fifth inning against Giants right-hander Ryan Vogelsong as the Pirates prevailed in a rematch of last year's National League wild-card game, which San Francisco won 8-0.

"You know what you're getting coming in," Cole said of facing the Giants at AT&T Park, where he never pitched previously. "They've been playing hot. I swear, the whole team's hitting .300. They're making diving catches in the right-center gap, the left-center gap. They're putting up two runs in the first on two broken-bat hits ...

"To grind it out ... we just chipped away."

Cole pitched seven innings and was gone before Giants catcher Buster Posey, representing the tying run, hit a long, high foul fly down the right field line with two outs in the eighth.

A fan wearing a Barry Bonds replica jersey from his Pirates days -- No. 24 -- reached over the wall separating the field from the seats and got a glove on the ball as Pirates right fielder Gregory Polanco was reaching for it.

It was initially called just a foul ball, but Pirates manager Clint Hurdle challenged the ruling, and it was overturned by the review panel in New York, ending the inning with Pittsburgh clinging to a 4-3 lead.

"The guy said, 'I'm sorry,'" Polanco said of a brief encounter with the fan after the ball fell to the ground. "I said, 'It's OK. You're trying to catch the ball, too.'

"I would have had it."

Hurdle said he's never previously challenged a fan-interference call -- or in this case, non-call -- but knew he could.

"We know the rules," he said. "I don't know if the guy thought he could make the catch and hand it go Gregory or what. He got in the way."

The fan was ejected even before the umpires signaled Posey out.

Closer Mark Melancon pitched a perfect ninth inning for his 14th save, preserving the Pirates' ninth win in 11 games.

Cole (8-2) gave up two unearned runs in the first inning and then shut out the Giants over the next six, allowing five hits in his seven innings. He walked two and struck out nine.

He joins Felix Hernandez of the Seattle Mariners and Bartolo Colon of the New York Mets as the majors' only eight-game winners.

His two biggest outs came when he struck out Giants first baseman Brandon Belt and then got shortstop Brandon Crawford to hit into a double play after San Francisco, down 4-2 at the time, loaded the bases with no outs in the sixth.

"He's tough man," Vogelsong said of Cole. "We had him on the ropes there. He made some big pitches."

Cole also scored twice, both times on sacrifice flies by center fielder Andrew McCutchen.

Catcher Chris Stewart had three doubles for the Pirates, accounting for half the team's six hits.

Vogelsong (4-3), who went unbeaten in five starts in May, took the loss. He gave up four runs, three of which were earned, on five hits in six innings. He walked two and struck out five.

Left fielder Nori Aoki and second baseman Joe Panik had two hits apiece for the Giants, who like the Pirates finished with six hits.

The loss was the Giants' third in a row.

"That was pretty much our undoing," Giants manager Bruce Bochy said of the missed opportunity in the sixth. "We had two good hitters up. They made pitches to stop it."

The Giants made two brilliant catches in the outfield in the first five innings on extra-base bids by McCutchen, but they couldn't prevent Pittsburgh from taking a 4-2 lead.

Ri