DENVER (AP) - Rookie Colorado Rockies pitcher Alex White is taking his lumps down the stretch.

Plagued by home runs, White was hit hard again Friday night in the Rockies' 9-1 loss to the San Francisco Giants, who won their sixth straight to keep their longshot playoff hopes alive.

White (2-2) gave up six runs on nine hits in 5 2-3 innings, including two of the Giants' three homers. He has allowed 11 home runs and has an ERA of 8.46 in five starts since coming to the Rockies as a key part of the trade that sent Ubaldo Jimenez to Cleveland.

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``It's frustrating,' White said. ``It's time for this not to happen. There's nothing to do but keep working. The good thing I can say is we're pretty much out of it as a team. If we weren't, I wouldn't be pitching. Trying to get this stuff out of the way before next year, I hope.'

His Giants' counterpart, Madison Bumgarner, allowed one unearned run in seven strong innings and hit a two-run double as San Francisco closed to within 6 games of NL West leading Arizona, which lost 2-0 at San Diego. Brandon Belt, Cody Ross and Chris Stewart all homered for the Giants, who also gained ground in the NL wild card race, getting to within five games of the Atlanta Braves, 12-2 losers to the New York Mets earlier. The Giants have 11 games left in the regular season.

Belt gave the Giants a 2-0 lead in the fourth when he connected for his second homer in as many days. He drove White's first pitch over the center field fence following Aubrey Huff's one-out single.

The Giants went up 3-0 in the fifth when Ross drove an 0-1 offering from White into the Rockies' bullpen behind the right-centerfield fence for his 14th of the season.

Colorado got on the board in the fifth when third baseman Pablo Sandoval bobbled Dexter Fowler's grounder for an error, allowing Willin Rosario to score from third base.

But the Giants broke the game open with a three-run sixth, with all the runs coming with two outs, including a two-run double by Bumgarner.

Ross lined a base hit to left, scoring Bumgarner and finishing White, but began limping noticably as he ran to first base. The team said Ross strained his right hamstring, and was replaced by pinch runner Andres Torres.

``The sixth inning was the inning that got Alex,' Rockies manager Jim Tracy said. ``It's a little tough on our kids against this bunch here who's still mathematically alive. It unravelled very quickly. That's how quickly at this level a game can get away. At this level you can't afford to misfire.'

With Aaron Cook making his first relief appearance in eight years in the seventh, the Giants added three more runs on Stewart's two-run homer and Brandon Crawford's RBI single.

Notes: Cook had made 184 consecutive starts for the Rockies since his last relief appearance on Sept. 27, 2003. ... Rookie left-hander Eric Surkamp will be going for his third victory in four outings when he starts for the Giants on Saturday against Rockies. It will be Surkamp's first appearance against the Rockies. He'll be opposed by fellow rookie Drew Pomeranz, a winner in his major league debut for Colorado last time out. ... INF Hector Gomez joined the Rockies on Friday after being recalled from the team's Double-A affiliate in Tulsa, where he hit .235 with 14 home runs and 50 RBIs. ... The Giants said after the game that Ross was expected to miss about a week but remained hopeful he could return for the season's last week.l