Mets' Steven Matz had successful surgery to reposition the irritated ulnar nerve in his left elbow on Wednesday, according to a source.
The Mets left-hander had been pitching through pain for a while, he said Monday.
An exam by team physician David Altchek on Monday revealed that a problem with Matz's ulnar nerve had caused the persistent pain and led to season-ending surgery.
Matz (2-7) hadn't won since June 28 and saw his ERA spike to 6.08 _ the highest of his career _ in 66 2/3 innings.