Cardinals pitcher Brad Penny(notes) was put on the 15-day disabled list Saturday with a strain his upper back, although the team believes it’s a minor injury. St. Louis general manager John Mozeliak said Penny received an injection and could return to throwing in 7-10 days. The Cardinals had worried the right-hander, 3-4 with a 3.23 ERA, might be lost for an extended period after getting pulled before the fourth inning of Friday night’s start. “It was good news,” Mozeliak said. “I wasn’t handicapping it either way but I was optimistic and hopeful and it seemed to work.” http://sports.yahoo.com/mlb/news;_ylt=Ao8Ls.toBPysmwh_HwEPfuMRvLYF?slug=ap-cardinals-pennydl