The Reds optioned Busenitz to Triple-A Louisville on Saturday.
With the return of Graham Ashcraft (calf) from the 15-day injured list Saturday, Busenitz will head back to Triple-A three days after being called up. The 32-year-old lefty didn't appear in a game during his latest stint and still carries a 4.50 ERA and 2.00 WHIP through four innings in the majors this season.