• Turning Point: Tulowitzki, who leads NL rookies with 26 RBIs, homered to right center in the sixth before sending a single to left field to score the game winning run.
• Unsung hero: Willy Taveras homered on Roy Oswalt's third pitch of the game. It was the center fielder's first home run in 349 at-bats since Aug. 4 against Tony Pena at Arizona.
• Figure this: Holliday has a career-best 15-game hitting streak.
• Quotable: "I only know one way to play, and that's to give everything when I'm in the lineup. I want to make every play and be a tough out on every at-bat." -- Tulowitzki
-- ESPN.com news services
Rockies 7, Astros 6
Tulowitzki started Colorado's comeback with a two-run homer, then singled home the winning run to cap a three-run rally in the ninth inning Thursday that led the Rockies over the Houston Astros 7-6.
"I only know one way to play, and that's to give everything when I'm in the lineup," Tulowitzki said. "I want to make every play and be a tough out on every at-bat."
Houston led 6-2 before Tulowitzki homered in the sixth off Roy Oswalt. The Astros were ahead 6-4 when Dan Wheeler (0-3), who had converted 10 straight save chances, took over from former closer Brad Lidge to start the ninth.
Kaz Matsui doubled leading off and scored on a single by Matt Holliday, his fourth hit of the game. Todd Helton lined the ball off the glove of left fielder Carlos Lee for a single, Garrett Atkins loaded the bases with a walk and Brad Hawpe tied the score with a sacrifice fly.
"I fell behind in the count and didn't get down," Tulowitzki said. "I stayed with the pitch and got enough of it to get it out of the infield."
Tulowitzki leads NL rookies with 26 RBIs.
"He's a good young player, he's exciting and he loves the spotlight," Colorado manager Clint Hurdle said of Tulowitzki. "He loves the big situation."
Jeremy Affeldt (3-1) pitched a scoreless ninth for the win. Wheeler blew a save for the second time in 12 chances.
Colorado's Josh Fogg, returning after a stint of the disabled list caused by a strained right groin, gave up six runs and 10 hits in five innings. He is 0-4 in his last six starts.
Oswalt allowed four runs and nine hits in six-plus innings.
"I was trying to get through seven or eight innings without using the bullpen," Oswalt said. "I got the pitch count and didn't throw great, but good enough to last."
"I played with Willie last year," Oswalt said. "He's got places where you can pitch to him, but I think he knew where I was going to throw him."
"This is certainly a tough one," Houston manager Phil Garner said. "You feel like you've got it in the bag, the kind we're accustomed to winning, and we just didn't do it."
Houston 2B Craig Biggio took a scheduled day off from the lineup, but did pinch hit leading off the eighth and struck out against Manny Corpas. ... Houston manager Phil Garner plans to use Carlos Lee or Biggio as designated hitters for interleague play. ... Holliday has a career-best 15-game hitting streak. ... Colorado is 4-0-1 in its last four series and finished 6-4 on its homestand.