Down 2-0 in the sixth, Collmenter was trying to get out of a jam, but allowed an RBI triple to rookie Maikel Franco.
"We were battling and putting runners on and couldn't get anything across," Collmenter said to AZCentral.com. "To give them two extra runs kind of deflates everything we were trying to do up to that point."
Collmenter, now 3-5, moved his ERA to 5.36 in 47 innings of work. He will look to bounce back Friday against the Cubs.
"I thought he kept us in the game," D-backs manager Chip Hale said to MLB.com. "Early it looked like he didn't have his control, the ball wasn't moving like he wanted it to. I thought later on he started to really get it going. He had a low pitch count, which is typical of him. He was fine."
"Fastball command is the beginning and ending of everything that I do well and tonight it was up in the zone and flat," Collmenter said after the game, per the Arizona Republic. "When it's like that, it's pretty easy to hit, as evidenced tonight."
Collmenter's struggles began immediately in the first inning when he surrendered four runs on three hits including a solo home run to Denard Span to leadoff the game. He then gave up a three-run home run to Ryan Zimmerman in the first.
Collmenter (3-4) also struggled in the second inning with five runs on five more hits. He only recorded one out in the inning before being pulled. Collmenter saw his ERA raise from 3.40 to 5.27. After allowing 10 runs in his first five starts, Collmenter has now surrendered 14 runs in his last two starts.
"I could be rushing my mechanics or something, not getting on top of the ball," he said. "It could be a variety of things. I'm not sure. I'll look at some tape and try to make a few adjustments going into the next start."
His next expected start is scheduled for Saturday at Philadelphia.
"I moved my fastball around pretty good," Collmenter said, per MLB.com. "Offspeed pitches were all pretty bad, and that's what I gave up a lot of the damage on. I just have to be better with those."
Collmenter (3-3) served up home runs to Justin Morneau, Nick Hundley and Drew Stubbs, which accounted for all of his damage on the afternoon. The right-hander was charged with five earned runs on 10 hits and no walks while striking out five over seven innings of a 13-7 victory. Of his 102 pitches, 63 were strikes.
Collmenter is 3-1 with a 2.40 ERA over his last three starts. He will seek his fourth win of the season Monday at home against Washington.
Tuesday's game between the
It's the second game in a row that has been postponed between the two teams. The Rockies and Diamondbacks will play a traditional doubleheader Wednesday.
Rain has postponed Monday night's game between the Rockies and the
The Rockies and Diamondbacks were set to begin a three-game series Monday but now the two teams will have to figure out when they can make this game up.
According to the Arizona Republic, Diamondbacks manager Chip Hale said that if the two teams are able to play Tuesday and Wednesday that Monday's game will be made up in either June or September.
For Tuesday's games, both teams are sticking with the starters scheduled to pitch Monday. That means the Rockies will put
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