McCullers (forearm) threw 20-to-30 pitches from the front of the bullpen mound at Tropicana Field on Tuesday, Brian Murphy of MLB.com reports.
Assuming he bounces back from the workout with no issues, McCullers might be ready for a normal bullpen session the next time he's scheduled to throw. The veteran right-hander has been brought along slowly since his nagging forearm issue flared up on him again back in mid-February. He'll need multiple rehab starts before rejoining the Houston rotation, so McCullers is still several weeks away from being activated from the 15-day injured list.