Mets general manager Sandy Alderson casually revealed this week that left-hander Johan Santana may not be ready for the start of the 2012 season. "We do have some question marks, of course, with Santana being one of them," Alderson said of the lefty pitcher's return from his September 2010 shoulder surgery. "We think he's going to be ready, but he might not be. That's where the [pitching] depth becomes important." Santana had hoped to pitch for the Mets by the end of last season, but setbacks prevented him from getting back to the majors.