Jacob deGrom's right elbow is healthy, but the New York Mets are uncertain whether he will return this season.
deGrom, 32, has not pitched since July 7 because of a sprained elbow. He was 7-2 with a 1.08 ERA and 146 strikeouts before being sidelined.
"At this point the sprain has resolved itself," Sandy Alderson said. "The elbow is perfectly intact based on the MRIs and the clinical evaluations from our doctors. We need to begin to see whether this is more of a chronic issue that relates to mechanics in some way."