Heller will begin a rehab assignment with Triple-A Scranton/Wilkes-Barre on Saturday.
Heller will take the mound as the opening pitcher for the RailRiders on Saturday in his first appearance since July 14. The 28-year-old underwent Tommy John surgery last year and recently had his rehab put on hold due to a right forearm strain. Should he experience no further setbacks, Heller could be in line for a stint with the Yankees in September.