Greinke, signed to a $147 million, six-year contract in December as a free agent, threw a bullpen session Friday without issue, then felt discomfort while throwing Sunday.
Dodgers manager Don Mattingly said Greinke had a MRI last week that detected no ligament damage.
Greinke was to be examined by Dr. Neal ElAttrache. The next outing for the 2009 AL Cy Young Award winner will be delayed pending the results.
Left-hander Hyun-Jin Ryu replaced Greinke as Monday’s starter.
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