DENVER (AP) -- Dustan Mohr finally delivered the hit that his manager had been waiting for.
"We had been looking for that big hit, big swing for quite some time," Rockies manager Clint Hurdle said. "I was looking for that at-bat since the fourth inning."
The Rockies stranded 10 runners after the fourth, including leaving the bases loaded in the 10th.
The doubleheader was scheduled to make up games postponed by rain and snow April 27-28.
The Rockies failed to score against Guillermo Mota despite putting two runners on with one out in the ninth and loading the bases in the 10th.
Josh Beckett threw 110 pitches in six innings, allowing two runs and seven hits. He struck out three, walked two and hit a batter.
"If you don't want the bullpen to give up anything then you have to go nine innings," Beckett said.
Neither De Los Santos nor manager Jack McKeon was available between games.
Florida took a 2-0 lead in the second inning on two-out singles by Aguila and Alex Gonzalez and Treanor's double to left-center.
Jeff Conine drew a leadoff walk off Marcos Carvajal in the sixth inning, stole second and moved to third on Mike Lowell's bloop single to right. He scored when Aguila hustled to beat the relay throw on a double-play groundball.
Ardoin's one-out squeeze bunt in the eighth scored Sullivan and tied it at 3. Ron Villone's three-base throwing error on Sullivan's bunt set up the play.
"It was a perfect bunt," Hurdle said. "I didn't choose the squeeze until it was 2-1."
Sunny Kim allowed two runs and five hits in the first four innings in his first start since the Rockies claimed him off waivers from Washington.
According to the Elias Sports Bureau, Sunny Kim and Byung-Hyun Kim became the first players with the same last name to start each end of a doubleheader since brothers Gaylord and Jim Perry did it for Cleveland on June 22, 1974, at Boston.
The doubleheader was the third traditional one at Coors Field and the 31st overall in the 12-year history of the Rockies. ... Conine stole his first base of the season. ... Ryan Jorgensen made his major-league debut. ... Todd Helton was cleared by Rockies trainers to begin his rehab assignment Monday in Triple-A Colorado Springs. ... Colorado placed reliever Dan Miceli on the 15-day DL retroactive to Aug. 5 with a deep bone bruise in his left foot.
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