In his two innings of work, he allowed two hits, one run and struck out one.
He recently threw a perfect inning for the GCL Mets on July 13.
Hefner said recently that he may be able to pitch in the major league game in 2014 (ESPN, June 22).
“If there’s a need here, and they want me here, I can foresee that,” Hefner said.
Hefner underwent Tommy John surgery on August 28, 2013, six weeks before Matt Harvey had the same surgery.