To make room for Erlin, the Padres optioned right-handed reliever Brad Brach to Triple-A Tucson. Brach, who began the season on the 25-man roster, was recalled from Tucson on June 23.
Brach appeared in two games since his promotion, tossing 1 2/3 scoreless innings in the first two games of this series against the Phillies.
It's been a busy week for Padres relievers -- past and current.
On June 22, the team recalled relievers Anthony Bass and Brad Boxberger from Tucson. After pitching that night, they were optioned the next day as Brach and Miles Mikolas joined the team. On June 24, Mikolas returned to Tucson as Tommy Layne joined the team.
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.