Hefner, 28, suffered a tear of his UCL and a fracture in his forearm during a rehab start in early-August.
A second Tommy John surgery means another 12-18 month recovery for Hefner, and almost certainly means that he will not appear in a major league game in 2015.
Hefner posted a 4.34 ERA and 1.29 WHIP for the Mets in 2013 in 130.2 innings pitched, though his numbers are skewed a bit due to the fact that he was pitching injured for a time before being shut down.
While Hefner’s re-injury (especially the forearm injury) is viewed by most as a freak occurrence, it hasn’t stopped the Mets from backing off Matt Harvey – another pitcher who is rehabbing from Tommy John surgery.
Hefner, like Harvey, was following the proper protocol, but the re-injury occurred anyway.
Daniel Hudson, another pitcher who underwent consecutive Tommy John surgeries, recently made his return, so Hefner can definitely use that example as motivation.
As far as Harvey is concerned, he’s scheduled to throw a few more bullpen sessions before being shut down for the winter. Using that timetable, Harvey will be roughly 16 months post-surgery before he faces live batters for the first time.