McCullers (shoulder) came through Wednesday's bullpen session fine, and will throw another such session Friday, MLB.com's Brian McTaggart reports.
If all goes well in Friday's session, McCullers is expected to go back out on a rehab assignment. There have been some setbacks along the way, so owners will want to make sure not to look too far ahead with the hard-throwing righty. The Astros would obviously like to get him back in the rotation at some point, but he will be handled with extreme care.