SCOTTSDALE, Ariz. (AP) - Once Buster Posey connected, Jorge De La Rosa knew exactly where the ball was going.

``That's the longest home run I've ever given up,' De La Rosa said.

Posey hit a long two-run shot to center field and a sharp single off De La Rosa, helping the San Francisco Giants beat the Colorado Rockies 7-5 on Thursday.

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``It's safe to say Buster Posey is a pretty good player,' Rockies manager Jim Tracy said.

Darren Ford also homered and Ryan Vogelsong threw three hitless innings for the Giants, who won for the third time in four games. Mike Fontenot added three hits, and Emmanuel Burriss had two hits and two RBIs.

De La Rosa allowed four runs and six hits over three innings in his first spring start. The left-hander pitched in an intrasquad game Sunday.

Colorado's Todd Helton doubled for his first hit of the spring.

Posey singled and scored on Burriss' base hit in the second. The reigning NL Rookie of the Year went deep with one out in the third, belting a drive that traveled an estimated 450 feet to straightaway center.

``It's hard to hit a ball much further than that,' Giants manager Bruce Bochy said. ``He got every bit of that.'

Rockies shortstop Troy Tulowitzki, who got a new six-year contract worth $120 million during the offseason, has been impressed with Posey from the start.

``Everybody knows he's real good,' Tulowitzki said. ``Some guys are just good players. Everything he's done since the beginning has been a class act. To hit a home run off that caliber of pitcher and to the middle of the field is impressive. His other at_bats were solid too. He's a pretty solid player.'

Vogelsong walked one and struck out two. He has thrown five shutout innings this spring as he tries to make a major league roster for the first time in five years.

``I felt better in the second and the third than the first,' Vogelsong said. ``I was just trying to feel out my mechanics a little bit.'

Tulowitzki hit his heel on his back swing in the bottom of the fourth and had to leave the game. He wasn't too concerned about it afterward.

``I've never done anything like that,' he said. ``It's just bruised a little bit and might be sore tomorrow.'

NOTES: RHP Aaron Cook, whose sore right shoulder has not shown any improvement for almost two weeks, asked for an examination by the Rockies' team doctor. ... Giants RHP Brian Wilson threw to hitters and could throw in a game as early as Sunday. ... Rockies OF Carlos Gonzalez said he lost Burriss' triple in the sun and just covered his face to avoid getting struck by the ball. ``I almost got killed,' he said. ``You can't catch what you can't see.' ... Rockies RHP Felipe Paulino, who could pitch himself into the starting rotation, allowed a run and three hits in three innings. ``That was a bright spot,' Tracy said.