Zack Greinke said Tuesday he didn't know whether he will be able to make his first scheduled start of the regular season for the Dodgers. Pitching coach Rick Honeycutt wouldn't speculate. Manager Don Mattingly said he thought Greinke would face the San Francisco Giants on April 2, but acknowledged that was only because he hadn't been told otherwise. "Anything that you are all writing, I think, is premature," Greinke said. "Nothing's 100% sure either way." A day after visiting team physician Neal ElAttrache in Los Angeles, Greinke returned to the Dodgers clubhouse saying he knew little about his sore right elbow. Greinke, who signed a $147-million contract in the off-season, underwent an MRI exam last week that revealed no structural damage. ElAttrache didn't order another MRI exam Monday, instead prescribing Greinke an injection of platelet-rich plasma and anti-inflammatory medication. But why Greinke had elbow inflammation remained a mystery, at least to him. "I guess I didn't really know what the problem was," Greinke said. "I guess I still don't. They might. But I'm not a doctor. I'm just going with what they're saying to me." Mattingly and Honeycutt said they also didn't know. The team's medical staff was unavailable to comment, as the Dodgers are now releasing medical information on players through their media relations department. "It was at a point where he felt he could throw, but it didn't feel quite right," Honeycutt said. "Our approach is, when something doesn't feel quite right, let's get it right first." What is known is this: Greinke is scheduled to play catch Friday.