The Padres optioned Kerr to Triple-A El Paso on Wednesday.
Kerr was sent packing to clear a spot on the 26-man active roster for Blake Snell (groin), who was activated from the 10-day injured list in advance of his scheduled start Wednesday in Philadelphia. During his week-and-a-half-long stay with the big club, Kerr made two appearances out of the bullpen and gave up two earned runs over 1.1 innings.