PHOENIX - Patrick Corbin's success has come from a simple formula - be aggressive and throw strike one.
The Diamondbacks' left-hander allowed two runs over 6 2/3 innings and Arizona beat the Colorado Rockies 4-2 on Sunday. It was the Diamondbacks' fifth win in six games.
"I thought today I was as sharp as I've been," said the 23-year-old. "I got a couple of fastballs up and that hurt me a little bit but I was able to keep us in it."
Corbin (3-0) scattered nine hits - four coming in his final 1 2/3 innings - and struck out five. Corbin didn't walk a batter for the second straight outing and hasn't allowed a base on balls in his last 15 innings.
"When you're getting ahead with that first pitch, the second pitch you can throw whatever you want," Corbin said. "It makes it 100 times easier."
Corbin became the second Diamondbacks pitcher to throw at least six innings and allow two runs or fewer in his first five starts of the season.
"He just keeps the ball in play," said Arizona manager Kirk Gibson. "He just competes. He works on things and understands the tools that he's acquired."
Gerardo Parra tripled and scored twice, and Josh Wilson had a run-scoring double for the Diamondbacks, who at 15-10 are off to their second-best start since 2006.
Rockies All-Star shortstop Troy Tulowitzki was lifted in the third inning because of a strained left shoulder.
J.J. Putz pitched the ninth for his fifth save for Arizona.
Colorado has two wins in its last eight games after opening the season 13-4, falling into a first-place tie with Arizona in the NL West.
Arizona broke through against Colorado starter Jon Garland (2-2) in the third, scoring twice.
Cliff Pennington singled to right, went to second on a sacrifice and moved to third on a single to left by Parra. After Cody Ross grounded out to advance Parra to second, Pennington scored on a passed ball.
Three pitches later, Garland threw a wild pitch to score Parra.
"You try and be aggressive without running into outs on the bases," Gibson said. "We're aware of what guys throw in certain counts and when to be aware to dirt-ball reads. 'G' made a good read on that because they were playing way off at third place which allowed him to come further down the way."
Paul Goldschmidt extended the lead 3-0 in the fourth when he singled and scored on Wilson's double off, and Parra tripled to lead off the fifth and scored on a Ross single to make it 4-0.
• Who: Giants at Diamondbacks
• When: 6:40 p.m.
• TV; radio: FSAZ; 1490-AM