DENVER -- The Colorado Rockies are ever so close to reaching the postseason for the first time since 2009 after walloping the Los Angeles Dodgers 9-1 on Friday night.

The victory reduced the Rockies' magic number to one, meaning one Colorado victory or one loss by the Milwaukee Brewers will enable the Rockies to win the second National League wild card and advance to the postseason for the fourth time in their 25 seasons of play. The Brewers beat the St. Louis Cardinals 5-3 on Friday night.

"Didn't get to do it tonight," said Rockies shortstop Trevor Story, who hit one of four Colorado home runs and finished a double shy of the cycle. "Hopefully we can take care of business tomorrow."

Chad Bettis, backed by an early barrage of home runs, made one of the best starts this season for the Rockies since coming back from testicular cancer and returning to their rotation Aug. 14.

Bettis (2-4) gave up four hits and one run in a season high-tying seven innings and retired the final 14 batters he faced. He got 12 outs on ground balls with one walk and four strikeouts in a 95-pitch outing that included 62 strikes. Bettis' other win also was against the Dodgers on Sept. 9 at Los Angeles.

"He's a guy that has to really stick that fastball," Rockies manager Bud Black said. "He has to change speeds. He has to move the ball in and out, up and down and he did that. I thought he probably did it his best the last 30-40 pitches he threw. Great outing, sets the tone for the game."

The four homers, all with two outs and all with a 3-2 count, gave the Rockies a 7-1 lead after four innings. Most of the damage was off Dodgers starter Hyun-Jin Ryu (5-9), who gave up three of the homers, six hits and five runs in a start that lasted two innings and forced him to throw 68 pitches just to get two outs.

"They were taking good at-bats against him tonight," Dodgers manager Dave Roberts said. "All night it seemed like it was a struggle for him to navigate through the lineup, 70 pitches, something like that, through two innings. It was a stressful couple of innings for him."

Nolan Arenado (home run No. 37), Mark Reynolds (30), Charlie Blackmon (37) and Story (24) connected for the Rockies, who finished one shy of their season-high five homers in a game.

Colorado took a 3-0 lead in the first when Arenado hit a two-out home run. Story followed with a single, and Reynolds belted a two-run shot to end a homerless drought of 44 at-bats since he last homered Sept. 10.

In the second, Blackmon walloped a two-run shot into the second deck in right field that went an estimated 454 feet and put the Rockies ahead 5-0. The hit scored Ian Desmond, who led off with a walk.

Colorado's 13th sellout crowd of 48,395, drawn in part by a post-game fireworks display, clamored for Blackmon. Desmond urged Blackmon to go out for his first curtain call.

"I'd never done that before, so I didn't really know what to do," Blackmon said. "Ian told me to go up there. I was like, 'Go where?' Then I kind of figured out what was going on, and that was really nice, really cool for me to have that connection again with the fans."

Justin Turner's one-out single off Bettis made it 5-1 in the third. The Rockies scored their final two runs in the fifth on a passed ball and a run-scoring single that Blackmon chopped over leaping first baseman Cody Bellinger. Blackmon's three RBIs gave him 103 overall and a major league record 102 as a leadoff hitter. Darin Erstad set the previous record of 100 RBIs leading off in 2000.

While a loss by the Brewers, whose game in St. Louis likely will end ahead of Colorado's, will send the Rockies to the postseason, they will try to beat the Dodgers for the sixth straight time Saturday. Los Angeles ace Clayton Kershaw will start and is expected to work about five innings as he tunes up for an Oct. 6 start in Game 1 of the Division Series.

"I want to play playoff baseball, I really want that," Blackmon said. "I'm trying my best to treat every baseball game like a regular baseball game, which is going to give me the best chance to perform well. So I try not to make too much of it, one way or the other."

NOTES: The Dodgers selected the contract of INF/OF Tim Locastro from Triple-A Oklahoma City and made room for him on the 40-man roster by putting OF O'Koyea Dickson (subluxed left shoulder) on the 60-day disabled list. Locastro made his major league debut when he pinch ran in the eighth and then played left field. ... Dodgers OF Chris Taylor is expected to be back in the lineup Saturday after suffering a left knee contusion Wednesday. ... Rockies 1B Mark Reynolds hit his 30th homer, giving him four seasons with at least 30 homers and his first since 2011 with Baltimore. ... Rockies 3B Nolan Arenado went 3-for-5, giving him a career-high 185 hits, surpassing his previous high of 182 hits set last year.