Brewers manager Craig Counsell said Peralta (lat) will miss "significant" time but is expected to pitch again this season, Curt Hogg of the Milwaukee Journal Sentinel reports.
Peralta was placed on the injured list Monday with a right lat strain, and he'll now be in line for a lengthy absence. Aaron Ashby will enter the rotation Wednesday in San Diego and should serve as Milwaukee's No. 5 starter while Peralta is sidelined.