Hamels is expected to throw 55 to 60 pitches for Double-A Frisco on Friday night. The team didn't announce any plan beyond that appearance.
The four-time All-Star was injured while warming up for a scheduled start May 2 at Houston. It's the first time Hamels has been on the disabled list since the Rangers acquired him at the trading deadline in 2015.
Hamels is 2-0 with a 3.03 ERA in five starts this season.