Cleavinger was added to the Phillies' 40-man roster Wednesday, Meghan Montemurro of The Athletic reports.
This protects him from the Rule 5 draft. The 25-year-old southpaw has yet to reach Triple-A, but he logged a 3.66 ERA, 1.28 WHIP and 83 strikeouts in 51.2 innings out of the bullpen at Double-A.