The Padres recalled Kerr from Triple-A El Paso prior to Wednesday's game against Atlanta.
Kerr joined the San Diego bullpen as a replacement for Nabil Crismatt (hip), who was placed on the 15-day injured list. Over his six appearances at El Paso this season, the lefty Kerr struck out six over 6.1 innings while pitching to a 2.84 ERA and 1.64 WHIP.