The month of April couldn't have gone much better for Jhoulys Chacin. The Rockies right-hander went 3-0 in four starts and left the month carrying a miniscule 1.46 ERA. Unfortunately for Chacin and Colorado, the 25-year-old hasn't been able to duplicate the same success at all so far in May.
In his first three starts this month, Chacin is 0-3 while surrendering a combined 16 runs (15 earned) over just 17 1/3 innings of work as his ERA has ballooned to 4.07.
The right-hander will look to turn things around Tuesday when he takes the mound against the National League West-leading D-backs at Coors Field.
Chacin is coming off his worst outing of the year. He allowed eight runs on nine hits over 5 1/3 innings vs. the Giants on Thursday.
"It looked like he struggled with his command," Rockies manager Walt Weiss said. "He had a hard time throwing strikes that inning. He got in some deep counts, some bad counts. "
Opposing Chacin for the D-backs will be Ian Kennedy. After defeating the Cardinals on Opening Day, Kennedy went through a winless stretch of seven starts before taking down the Braves on Wednesday.
The right-hander wasn't all that sharp in the game, giving up three runs and lasting just five innings, but given how long it had been since he was in the win column, Kennedy wasn't complaining.
"You'll take every single one of these wins," he said. "You want to throw deeper into the game, but you'll take every single one of these."
Walks have been an issue for Kennedy this season, as he has issued 21 free passes over his last seven outings.
Rockies: Cuddyer on track for Friday return
Rockies right fielder/first baseman Michael Cuddyer will play Tuesday and Wednesday at extended spring training in Scottsdale, Ariz. and if all goes well, he will rejoin the active roster Friday in San Francisco.
Cuddyer, on the 15-day disabled list with a bulging disk in his neck, said Monday that he is doing all baseball activities without pain and is ready for game action.
"I'll get a lot of at-bats and freedom as far as playing the field -- maybe play five innings or seven innings, but still hit," Cuddyer said.
Cuddyer last played on May 8 before the neck problem flared. He is batting .319 with seven home runs and 23 RBIs in 31 games.
D-backs: Reynolds used to altitude
When he pitched for the Rockies from 2010-12, Matt Reynolds had more success than most at Coors Field, and the D-backs left-hander is plenty familiar with the effects of pitching at mile-high altitude.
"You might not notice it as much when you come in for a series," Reynolds said. "But you definitely do when you're coming back all the time throughout the year."
Reynolds experimented with different workout routines and tried to get more sleep as a way of recovering better while playing in the thinner air that makes extra demands on the body.
• Rockies left-hander Jeff Francis, on the disabled list with a left groin strain, plans to throw a bullpen session Tuesday -- his first time pitching from the mound since he sustained the injury on May 14.
• The D-backs' pitching staff hasn't given up a home run in a franchise-record-tying six consecutive games.
Tyler Emerick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.