Green was optioned to Triple-A Scranton/Wilkes-Barre on Tuesday, Jared Diamond of the Wall Street Journal reports.
Green joined the Yankees rotation for a spot start Monday against the Diamondbacks, but it was short-lived as he managed to go just four innings out in the desert. He allowed four runs on eight hits, two of which were home runs, before being pulled from the contest. Green will head back to the minors, where he has been dominant this season, recording a 1.22 ERA and 1.11 WHIP over 37.0 innings.