Cole Hamels entered camp behind everyone else and could miss two starts. Pettibone and Martin were injured before the two-week mark. Adam Morgan underwent offseason shoulder surgery.
Miguel Gonzalez was scheduled to start Saturday against the Yankees, but David Buchanan's name replaced the Cuban's on the lineup card. Gonzalez will pitch in relief because pitching coach Bob McClure wants to ease his new pitcher into action.
No team survives a season using just five starting pitchers; the major-league average last season was 10.3 per team. A month before opening day, there are overwhelming questions about the Phillies' options.
Pettibone, 23, cannot shake a shoulder ailment that prohibited him from pitching the last two months of 2013. He followed a rigorous rehab program but the injury lingered into this spring. He did not appear to throw at maximum effort Friday.
"That was the first stepping-stone," he said afterward. "Now it's game on."
His confidence will be met with skepticism because Pettibone believed in late January he overcame the shoulder issue. That was soon proven wrong.
Martin received an MRI exam Friday, Amaro said, but the results were not immediately available. He threw no harder than 85 m.p.h. - or 12 m.p.h. below his max velocity - on Thursday. He complained of pain in the rear of his right shoulder.
The Phillies must hope for a similar prognosis to Pettibone's. The righthander thinks he could throw a few more bullpens, face some hitters, and jump into Grapefruit League action. He expects to be ready for April. Time will tell if that optimism is realistic.
"I feel pretty good," Pettibone said.
The Yankees will unleash their three aces - CC Sabathia, Hiroki Kuroda and Masahiro Tanaka - in Saturday's game against the Phillies in Tampa, Fla. Tanaka, the Japanese sensation signed to a seven-year, $155 million contract, will make his American debut.
"It's early," manager Ryne Sandberg said. "I guess it's a little bit of a gauge where our hitters are at."
Jimmy Rollins launched a three-run homer off Jose Valdez, who pitched in single-A ball last season. He twice walked and scored two runs. . . . Detroit used a split squad composed of mostly minor-leaguers in its 10-6 loss.