The Phillies optioned Coonrod to Triple-A Lehigh Valley on Wednesday.
Coonrod's demotion clears a spot on the 28-man active roster for right-hander Zack Wheeler (forearm), who was reinstated from the 15-day injured list ahead of his scheduled start Wednesday against the Blue Jays. Since returning to the Phillies in mid-August following an IL stint of his own, Coonrod turned in a 7.82 ERA, 1.50 WHIP and 12:7 K:BB in 12.2 innings across 12 appearances out of the Philadelphia bullpen.