Cleavinger was optioned to Triple-A Oklahoma City on Friday, Mike DiGiovanna of the Los Angeles Times reports.
Cleavinger has been effective while serving mainly as a low-leverage reliever in the majors this year, as he's posted a 2.12 ERA and 1.59 WHIP in 17 innings across 20 appearances (one start). The southpaw will now head to the minors after Darien Nunez was recalled from Triple-A Oklahoma City in a corresponding move.