Nolan Gorman hit a tiebreaking homer in the eighth inning, Tyler O'Neill homered among his two hits, and the St. Louis Cardinals beat the host Colorado Rockies 7-4 in Denver on Wednesday.
Nolan Arenado also went deep, Paul Goldschmidt had two hits, Andre Pallante (1-0) pitched around a blown save and Ryan Helsley earned his third save.
Jurickson Profar homered and Charlie Blackmon had two hits for Colorado. The Rockies finished their homestand 3-4.
Profar homered on Flaherty's first pitch of the game for a 1-0 lead, but O'Neill tied it with a two-out solo shot to center in the second. It was the second homers of the season for Profar and O'Neill.
Goldschmidt led off the fourth with a walk and Arenado hit Jose Urena's next pitch into the seats in left to make it 3-1. It was Arenado's second of the season and the 139th homer he has hit at Coors Field, which tied him for third all-time there with former teammate Carlos Gonzalez.
Urena allowed three runs on five hits and fanned six in five innings.
Flaherty walked Blackmon leading off the bottom of the fourth. Blackmon went to second on a passed ball, moved to third on Ryan McMahon's single and scored on C.J. Cron's double play.
Flaherty left in the sixth inning after Blackmon doubled to put runners on second and third with one out. Flaherty allowed two runs -- one earned -- on five hits and struck out six in 5 1/3 innings.
St. Louis scored again in the seventh when O'Neill led off with a single, stole second and scored on Taylor Motter's double.
The Rockies tied it in the bottom of the inning on Elias Diaz's RBI single and Profar's groundout that drove in Yonathan Daza, but Gorman struck in the eighth.
After Willson Contreras reached on a two-out error, Gorman homered to left off reliever Justin Lawrence (0-1). It was his fourth of the season.
The Cardinals added a run on Goldschmidt's RBI single in the ninth.
More must-reads: