The Mets said Matz underwent an MRI and CT scan on Monday, as well as an injection for diagnostic purposes, and that surgery has been recommended to reposition the nerve and eliminate irritation.
Teammate Jacob deGrom underwent a similar procedure last September.
Matz, 26, had Tommy John surgery coming out of high school and more surgery to remove a bone spur last offseason
He began the season on the disabled list and has been struggling since his return, going 2-7 with a 6.08 ERA.
Matz’s surgery is the latest setback for an injury-ravaged Mets pitching staff. New York began the season with World Series aspirations, but deGrom is the only starter remaining from the projected five-man rotation. Noah Syndergaard, Matt Harvey and Zack Wheeler are on the disabled list, and Matz will soon join them..
Manager Terry Collins said that lefty Tommy Milone, who is 1-2 with a 7.91 ERA this season between the Mets and Brewers, is likely to get the call to replace Matz in Tuesday’s start against the Diamondbacks.
Information from The Associated Press was used in this report.