The Reds designated Busenitz for assignment Sunday.
Cincinnati needed to make room for Hunter Greene's (elbow) return from the 15-day injured list, and Busenitz was the roster casualty. He was previously DFA'd in August and passed through waivers unclaimed, and that will likely happen again this time around, given the 34-year-old's struggles in limited action in the majors this season (13.50 ERA, 2.25 WHIP in four innings).