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Hefner has decided to retire from baseball, ending his 10-year professional career.
Hefner has been unable to recover after tearing his rotator cuff this past summer, which seems to be the reason he's calling it a career. The right-hander played just two seasons in the majors, in which he went 8-15 with a 4.65 ERA over 36 starts for the Mets. Hefner signed a minor league contract with the Cardinals last winter and spent the 2016 season at Triple-A Memphis.
