PHILADELPHIA (AP) - Matt Cain and Cole Hamels made it feel like October baseball again.

In what played like a rerun of Game 3 of last year's NL championship series, Cain pitched into the eighth inning to top Hamels and lead the San Francisco Giants to a 2-1 win over the Philadelphia Phillies on Wednesday night.

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``Any time you play the Giants with that pitching and bullpen, it figures to be low scoring,' Hamels said.

Maybe not after the Giants pulled off a major deal.

The defending World Series champions acquired All-Star New York Mets outfielder Carlos Beltran when he accepted a trade after the teams worked out the framework of a deal.

Without Beltran, the Giants scratched out two runs to deny Hamels (12-6) his NL-best 13th win.

``That's a tough team, they battle you all the way,' Hamels said. ``You know they'll put some good at_bats together.'

The NL West-leading Giants won for the third time in four games.

Beltran is expected to join the Giants in Philadelphia in time for Thursday night's series finale.

San Francisco also could have Tim Lincecum back on the mound for the finale. The floppy-haired ace was scratched from his start Tuesday because of an illness, but manager Bruce Bochy was hopeful he would start the finale.

With Lincecum out, Cain (9-6) had his start moved up a day and again quieted Philadelphia's bats. Cain pitched seven shutout innings and beat Hamels in Game 3 of the NLCS last year. Hamels struck out eight and allowed three runs. The Giants beat the Phillies in the NLCS and this three-game series was billed as a sneak peek for another potential October showdown.

Each team has won a game, but the Beltran deal could help keep the pennant on the West Coast.

``We're not an offensive team,' Bochy said.

They acquired a nice piece toward becoming one.

The Mets would get pitching prospect Zachary Wheeler, who is 7-5 with a 3.99 ERA in 16 starts for San Francisco's high Class-A affiliate in San Jose. The Giants selected Wheeler with the No. 6 pick in the 2009 draft.

Giants manager Bruce Bochy called Beltran ``one of the elite players of the game.'

The Giants entered batting only .241 with 66 homers and 371 runs scored, all numbers that rank toward the bottom of the NL. Beltran is batting .289 with 15 home runs and 66 RBIs. Asked where Beltran would play in the outfield, Bochy laughed and refused to specifically discuss the trade.

Cain allowed an unearned run and four hits before he was yanked when pinch-hitter Ross Gload reached on catcher's interference leading off the eighth. Javier Lopez got three outs and Brian Wilson finished for his league-leading 32nd save and a combined four-hitter. The Giants have won 12 of 17.

Aaron Rowand helped the Giants strike first when he sliced an opposite-field triple into the right-field corner in the third for a 1-0 lead.

Jeff Keppinger doubled to lead off the seventh and Cody Ross, the NLCS MVP, walked. Nate Schierholtz followed with a low liner and right fielder Domonic Brown took a weird route before failing on a diving attempt, helping the Giants extend the lead to 2-0.

``I didn't think I could catch it, I just tried to stop it,' Brown said. ``Those kinds of balls, you're not sure where it's going and it was hit hard.'

It was one of the few hard hits against Philadelphia's star lefty. Hamels, who threw eight shutout innings in his last start against San Diego, escaped the rest of the inning without further damage after loading the bases with no outs. Rowand grounded into a double play to end the rally.

Hamels struck out six in 7 2-3 innings and has allowed two runs or less in 11 of his last 12 starts.

``You don't want to give up that run, because with Cain, it might be enough,' Hamels said.

Staked to a 2-0 lead, Cain ran into trouble in the seventh. Cain and catcher Eli Whiteside couldn't get out of each other's way on Shane Victorino's infield popup. They bumped each other and the ball was knocked into foul territory for a two-base error. Brown's hard grounder deflected off first baseman Aubrey Huff and into right to make it 2-1.

Carlos Ruiz hit into a double play to end the threat.

NOTES: Phillies RHP Roy Oswalt allowed one run and one hit while throwing 72 pitches in a rehab start for Triple-A Lehigh Valley. Oswalt likely will need at least one more start before returning to the Phillies. ... The Phillies held a pregame ceremony for new Hall of Famer Pat Gillick. Gillick was the general manager when the Phillies won the World Series in 2008. He's a senior adviser for the team. Gillick became teary-eyed as a portrait was unveiled and he took a victory lap in a car around the field.