Greinke's abdominal MRI came back clean Friday, and he'll throw a bullpen session Saturday before the Diamondbacks determine whether he'll require a stay to the injured list, Bob Nightengale of USA Today reports.

Greinke departed Wednesday's start against Pittsburgh with abdominal tightness, but his MRI brought good news. Even if a trip to the shelf is needed, Arizona doesn't expect Greinke to miss more than two starts.

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