A pair of young right-handers will square off on Saturday in Denver.
For the Rockies, it will be right-hander Tyler Chatwood, who will make his return to the mound after missing a start with inflammation in his right triceps and elbow area.
Chatwood had his arm flare up following his last outing when he exited after four innings against the Reds on June 3. It was the only start of the year that Chatwood had not lasted at least 5 2/3 innings. The 23-year-old has a 2.14 ERA in six starts in 2013.
Jonathan Pettibone will get the start for the Phillies, who have won two in a row after losing five straight. Pettibone was charged with one of those defeats. Last Sunday, the righty allowed six runs -- four earned -- to the Brewers in 5 1/3 innings.
"I wasn't doing the little things on my part," Pettibone, 22, said after his last outing. "I didn't field my position, letting the leadoff guy on. I was way ahead of the catcher and hit him to load the bases with nobody out. So that's a disaster waiting to happen. I obviously have to limit those little things and limit the damage there."
The Phillies were victorious in six of Pettibone's first seven starts since he was called up to the Majors in April, but he has dropped his last two decisions.
Phillies: Diekman makes season debut
The Phillies' bullpen has been one of the many problems the team has had this season. And its latest addition, left-hander Jake Diekman, made his season debut Friday.
Diekman allowed a single to Carlos Gonzalez to start the bottom of the seventh inning, but got two outs before being pulled. Gonzalez was stranded at third, so Diekman got out of the frame without allowing a run during the Phillies' 8-7 win.
He was called up from Triple-A Lehigh Valley on Thursday, and with a bullpen that has struggled, Diekman may get more chances if he can get batters out.
"Anything that Diekman can do to help him from a standpoint of getting his command and mechanics and things like that, get him right, that's good," Phillies manager Charlie Manuel said.
• Carlos Ruiz will begin a rehab assignment Saturday for Lehigh Valley. The catcher strained his right hamstring on May 19 and said he hopes to return to the Phillies by next weekend. The Phillies are also without catcher Erik Kratz, who hurt his left knee Sunday and was placed on the disabled list the next day.
Rockies: CarGo feels better, in the lineup
Gonzalez was back in the Rockies' order just a day after getting hit with a foul ball.
Gonzalez suffered a left foot contusion after he was drilled with a foul ball in the on-deck circle of the Rockies' loss to the Nationals on Thursday, but he didn't need much time to heal.
Gonzalez was hitting third in the order and was productive. He went 4-for-4 in the game and homered in the first inning.
"I actually felt better waking up," Gonzalez said of his foot before the game. "That's what I was hoping. Last night I was feeling a little pain in my leg so I iced a couple of times, so I actually was concerned about how I'd feel this morning. I feel fine. I'm actually better."
• With the win Friday, the Phillies have won 27 of their last 33 games against the Rockies.
• Gonzalez tied Phillies left fielder Domonic Brown for the National League lead in homers with 19.
Stephen Pianovich is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.