Medina was optioned to Triple-A Syracuse on Thursday, Anthony DiComo of MLB.com reports.
Medina fired three scoreless innings Wednesday against the Reds, and he'll head back to the minors in favor of a fresh bullpen arm. The 25-year-old has a 3.00 ERA, 1.14 WHIP and 16:4 K:BB across 21 innings for the Mets this year, so it should only be a matter of time before he receives another look in the majors.