McCullers (shoulder) is expected to throw a "couple of innings" Thursday at extended spring training, Brian McTaggart of MLB.com reports.
McCullers -- who was placed on the DL on Friday -- is with the team in New York for Opening Day, but he'll fly to the Astros' facility Tuesday to prep for Thursday's session. Barring any sort of setback, McCullers could embark on a rehab assignment in the near future in hopes of returning to the Astros by mid-to-late April.