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DENVER - Jorge De La Rosa pitched six strong innings to win his sixth consecutive decision, Todd Helton homered and the Colorado Rockies snapped the Los Angeles Dodgers' six-game winning streak with a 7-5 victory on Wednesday night.

De La Rosa (16-6) allowed two runs and six hits in matching his career high for wins in a season and tying Washington's Jordan Zimmermann for most wins in the National League. De La Rosa went 16-9 in 2009 for the Rockies.

Colorado built an early lead off Edinson Volquez, who was making his first start for Los Angeles after being signed last week by the Dodgers following his release by San Diego. He is 0-5 in six starts against Colorado this season.

Rockies rookie third baseman Nolan Arenado left after the fourth inning with a right thumb contusion.

After the Dodgers pulled to 4-2 on Scott Van Slyke's bases-loaded double play grounder in the sixth, the Rockies extended their lead to 7-2 in the seventh on an RBI single by Josh Rutledge, a sacrifice fly by Troy Tulowitzki and a balk by Carlos Marmol that brought Rutledge home.

The Dodgers rallied for three runs in the eighth off Matt Belisle. Michael Young had his second RBI single of the game and one out later, second baseman Rutledge booted A.J. Ellis' grounder for an error. Juan Uribe followed with an RBI double and Skip Schumaker had an RBI single.

Manuel Corpas relieved, and struck out pinch-hitters Carl Crawford and Yasiel Puig to end the inning. Rex Brothers pitched a scoreless ninth for his 15th save in 16 chances.