The Athletics are going to open the 2012 season with a few nagging injuries. Manny Ramirez, who did not travel with Oakland to Japan, strained a hamstring last week. Meanwhile, left-hander Dallas Braden, who has been placed on the 15-day disabled list, suffered a setback in his recovery from shoulder surgery when he strained his throwing shoulder last week. "He's not throwing right now," Bob Melvin said. "We're on hold with that. I don't have a timetable with him."