Lockridge's timeline for a return has been pushed back to late July after imaging showed a chondral flap in his right patella, Curt Hogg of the Milwaukee Journal Sentinel reports.
Lockridge landed on the 10-day injured list in early May with a right knee laceration, but subsequent testing revealed that he also has cartilage damage. He will have arthroscopic surgery on the knee and is now expected to be shelved until after the All-Star break.