SAN FRANCISCO -- Record-setting rookie shortstop Trevor Story had no idea what he was starting with his fifth-inning leadoff home run Thursday night.
"I was just trying to start the inning off, get on base, and I happened to hit one out," said Story, whose homer off Matt Cain began a Rockies single-inning record 13 runs in a 17-7 victory over the Giants at AT&T Park.
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The outburst, which gave Colorado a 17-3 lead, surpassed the 12 the Rockies scored against the Cubs in the eighth inning at Coors Field on July 30, 2010. The previous record for a road game was nine, in the seventh inning vs. the Cardinals on June 5, 2009.
The Rockies scored the most runs by any team in any inning since the D-backs scored 13 in the fourth against the Pirates on April 11, 2010.
"The at-bats were good all night, especially in that big inning," Rockies manager Walt Weiss said. "We kept the line moving and guys beared down, one through nine really, and put together some really good at-bats."
Every Rockies hitter except for leadoff man Charlie Blackmon batted twice. Carlos Gonzalez, Tony Wolters, Blackmon and Mark Reynolds each doubled.
"It's not easy to hit," Blackmon said. "It's not easy to score runs. We work really hard to do that. It's nice to see it all come together."
Not only did Story's homer make more rookie history -- his 11 homers in the first 27 games of his career tied George Scott (1966) for the Major League record -- but he added a run-scoring single his second time up.

Story was happy with all the hits he and his teammates managed.
"It's not like we were hitting home runs all the time," he said. "We were hitting line drives and working all over the yard."
Gerardo Parra, who drove in three runs with his two fifth-inning singles, said the success made him feel "more comfortable, more relaxed -- the pressure was on them, not us."
The inning was helped along by two early Giants errors. By the time the carousel was over, Cain was charged with eight runs, six earned, in four innings plus the first four batters of the fifth. Vin Mazzaro absorbed six hits and nine runs, seven earned.
Two-run hits also came from rookie catcher Wolters (a double), who has earned high marks defensively but whose .159 average shows that jumping from Double-A last year to the Majors isn't easy, and starting pitcher Chris Rusin (a single), who didn't make it through the fifth and therefore didn't qualify for a win.