Entering the fifth, the Rockies led 4-3 in what seemed like a fairly routine ballgame, even if it was a bit high-scoring for AT&T Park. Nolan Arenado opened the scoring with a two-run home run against Giants starter Matt Cain in the first and Gerardo Parra scored from second on a Mark Reynolds infield hit later in the inning, giving the Rockies a 3-0 lead.
The Giants got two back in the bottom of the inning on a double from Buster Posey and each team added a run in the second to make it 4-3 after two.
Then came the fifth, when the Rockies offense erupted against Cain. In all 17 hitters came to the plate in the inning, here's how it went down:
Trevor Story homered (Rockies lead 5-3)
Carlos Gonzalez doubled
Arenado reached on an error
Parra singled (Rockies lead 6-3)
Vin Mazzaro replaced Cain
Reynolds reached on an error
Tony Wolters doubled (Rockies lead 8-3)
Chris Rusin grounded out
DJ LeMahieu singled (Rockies lead 9-3)
Charlie Blackmon doubled (Rockies lead 10-3)
Story singled (Rockies lead 11-3)
Arenado hit by pitch (Rockies lead 12-3)
Parra singled (Rockies lead 14-3)
Reynolds doubled (Rockies lead 15-3)
Derek Law replaced Mazzaro
Wolters struck out
Rusin singled (Rockies lead 17-3)
LeMahieu grounded out
In all, the inning involved 13 runs on 10 hits, a walk and a hit by pitch for the Rockies with a pair of Giants errors and three San Francisco pitchers used. It took 37 minutes and 45 seconds. The 13 runs the Rockies scored in the inning were the most in franchise history and the most any team had scored in an inning since the Diamondbacks scored 13 in an inning against the Pirates on April 11, 2010.
However, even with a 14-run lead, Rusin allowed four hits and two walks to the first seven Giants hitters in the bottom of the fifth and with his pitch count climbing was pulled before pitching the requisite five innings to earn the win. He pitched 4⅓ innings, allowing seven runs, all earned, on 13 hits with two walks and four strikeouts, leaving the game at 17-7.
Christian Bergman and Scott Oberg combined to pitch 4⅔ innings of scoreless relief as neither team threatened after the fifth. In fact, no Rockies reached base in the final four innings.
The 17 runs were the second-most scored on the road in franchise history; they scored 19 in Houston on September 25, 2011.
The win moved the Rockies to 5-2 on their current 10-game road trip and pulled them into a three-way tie atop the NL West with the Giants and Dodgers at 14-14 on the season.
Colorado can pull above the .500 mark and in front of the Giants in the standings with a win tomorrow as Chad Bettis takes the mound against Madison Bumgarner. First pitch is at 8:15 p.m. Mountain time.