The Coors Field water bill went sky high Monday night.

The Rockies set off the center-field fountains with five home runs in an 8-2 stomping of San Francisco. Two homers flew off the still-sizzling bat of Charlie Blackmon, who had the first multi-homer game of his career.

The onslaught provided a comfy security blanket for starter Jorge De La Rosa, who earned his first victory in five starts. De La Rosa, working with Wilin Rosario behind the plate for the second time this season, needed 102 pitches (59 strikes) to maneuver through five innings. Manager Walt Weiss would have preferred a longer, more economical start, but given that the left-hander came in 0-3 with a 7.58 ERA, it was a leap forward.

For the first time this season, the Rockies' $11 million lefty didn't come unglued when the heat was on. Rather, De La Rosa threw his best stuff at the Giants when he was in the most trouble.

Case in point: The third inning when the Giants loaded the bases with three consecutive singles, De La Rosa got the dangerous No. 3 hitter Buster Posey to ground into an exploded-bat double play. De La Rosa escaped the inning allowing just one run.

"Jorge's pitch count got elevated and he pitched into some trouble, but he pitched out of it," said Rockies manager Walt Weiss. "That's a good sign, pitching out of jams. That's what he struggled with early on, and last year he was so good at it."

De La Rosa was happy to get the win on a night when he wasn't sharp.

"I made some good pitches when I needed to," he said. "It felt good to get the win, finally."

Although right fielder Michael Cuddyer went on the disabled list Monday with a strained hamstring, and Carlos Gonzalez has a sore left knee and is mired in a slump that's dropped his average to .267, Colorado's powerhouse offense keeps on rolling, at least at home.

"It's a big deal," said Blackmon, who now has four homers and is hitting .411. "I really wanted to win the first game of the series. We got some good pitching, played some defense and got some big hits with men on base. That was a really solid way to start off the series."

Nolan Arenado, starting in the No. 2 hole for the first time this season, launched a solo homer to left in the first inning off Giants right-hander Ryan Vogelsong. Arenado extended his hitting streak to a career-best 12 games. Four batters later, Wilin Rosario hit a three-run homer to left off the shell-shocked Vogelsong.

Blackmon added a solo shot off Vogelsong to start the second and blasted another solo shot in the eighth, his first multi-home run game.

Vogelsong stuck around for just 1 innings, his shortest start in a Giants uniform. He called his performance "embarrassing." The shortest start of his career came with the Pirates on Sept. 24, 2004 vs. Cincinnati when he failed to retire any of the seven batters he faced, allowing seven runs on four hits and three walks.

Colorado center fielder Corey Dickerson, batting seventh, brought the fountains to life in the third, belting a two-run home run to deep center off reliever Yusmeiro Petit. He matched a career high with three hits, finishing a triple shy of the cycle.


Rockies right-handed reliever Tommy Kahnle was masterful in his scoreless sixth and seventh innings, striking out five of the seven batters he faced. Giants center fielder Angel Pagan got tossed by home-plate umpire John Tumpane in the seventh for arguing a called third strike.

"Tommy Kahnle was great," Weiss said. "With Jorge's elevated (pitch) count, I was hoping Tommy would give us two innings, and he gave us two strong ones. It was a good night all the way around."