The Cardinals optioned Leahy to Triple-A Memphis on Sunday.
Leahy served as the 27th man for Saturday's doubleheader with the Atlanta and was called upon out of the bullpen in the second game. He delivered two scoreless innings to finish out the Cardinals' 9-5 win, notching his first MLB save in the process. Though he'll head back to Triple-A, Leahy should rank near the top of the list for a call-up the next time the Cardinals are in need of an extra relief arm.