Saturday's originally-scheduled starting pitchers will start the first game, with Phillies ace Cole Hamels opposing right-hander Tyler Chatwood of the Rockies. Rookies Tyler Cloyd of the Phils and Drew Pomeranz of the Rockies will go in the nightcap.
When Cloyd filled in for an ill Hamels on Aug. 29 and delivered six strong innings, giving up just three earned runs in his Major League debut, the 25-year-old earned another start at the highest level.
When the young gun tossed seven innings and allowed only one earned run five days later in a win against the Reds, Cloyd anointed himself as a potential star for the Phillies moving forward.
In his most recent outing, Cloyd beat the Reds by holding them to just four hits over his seven frames of work.
"I was just trying to go out there and have a little bit better outing than my debut," Cloyd said after the game. "I felt a lot calmer out there today and a little bit more relaxed. Just go out there and do what I know how to do, and pitch and move the ball around. Obviously, the results came, and I couldn't feel better."
The Phillies' 18th-round pick in the 2008 First-Year Player Draft is now 1-1 with a 2.77 ERA in two starts, after going 15-1 with a 2.26 ERA in the Minors before he was called up.
"He was good, real good. Last time out, he was pretty good," Phillies manager Charlie Manuel said after the game. "He gave us a quality start last time out, and today he was better. Tremendous command. He changed speeds good. He used all of his pitches, and he wasn't afraid to throw them in any part of the count."
Opposing Cloyd for the Rockies will be Pomeranz. The 23-year-old tossed three scoreless innings against the Braves in his last start, giving up five hits before being removed.
"My arm didn't feel that great," Pomeranz said after the game, "but I've got to expect that. It's part of it."
Phillies: Frandsen is day to day
• An MRI revealed on Saturday that Kevin Frandsen has a stress fracture in his left fibula. He is day to day and the Phillies say he can play to the tolerance of the pain, but he will likely sit out the remainder of this weekend's series against the Rockies.
Frandsen will be re-evaluated before the start of Monday's home series against the Marlins, assistant general manager Scott Proefrock said, adding he thought Frandsen sustained the injury during the recent series in Atlanta.
Frandsen has impressed since coming up from Triple-A Lehigh Valley on July 27, compiling multihit games in 12 of his 33 starts at third base. Overall, he's hitting .336 with three doubles, a home run and eight RBIs. His 37 hits in August tied for third-most in the National League.
Rockies: Tulo nearing return
• The possibility that the Rockies will soon activate shortstop Troy Tulowitzki could be a step closer to reality after Saturday night. Tulowitzki was scheduled to play nine innings for Tulsa on Saturday night in Game 4 of the Texas League playoff series with Springfield.
Tulowitzki has been out since the end of May with a left groin injury that required surgery.
Tulowitzki played parts of Game 1 and Game 2 of the series, going 2-for-6 with a double and an RBI. Being slated for nine innings is a sign that Tulowitzki is moving past the tentativeness that has kept him from being activated.
"I don't definitively know what the answer to that question is," manager Jim Tracy said. "But with all the activity that Tulo is getting, the thought process is that at some point in time, we'd like to get him back here and get him involved in games between now and season's end. When exactly that will be? I haven't been told."