Currently at the Mets' Port St. Lucie training complex, Humber is expected to visit noted Dr. James Andrews in Birmingham, Ala. shortly.
Newsday reported that Humber has been told there are three possible ways to treat his elbow, and Tommy John reconstructive elbow surgery is an option at this point. Recovery time for that procedure is typically at least one year.
Humber was given a $3 million signing bonus in January, and attended the club's winter minicamp. He went 2-6 with a 4.99 ERA in 14 starts for Class-A St. Lucie, striking out 65 batters in 70-1/3 innings.