Jung (calf) was sent to Triple-A Round Rock on Tuesday to begin a rehab assignment.
Jung hasn't seen the field since July 21 due to a strained left calf, but he's now ready for game action after recently progressing to facing live pitching. It's not clear how many rehab games the 28-year-old will require before being reinstated, but it's possible he's back with the Rangers this weekend in Arizona.