McCullers (shoulder) tossed 30 pitches in a simulated game Wednesday, Brain McTaggart of MLB.com reports.
McCullers was placed on the DL on Friday, and threw the simulated game at the Astros' facility in Kissimmee, Florida on Wednesday. McCullers is expected to head out on a rehab assignment in the near future before returning to the Astros by mid-to-late April.