McCullers (forearm) threw a light bullpen session Saturday, Matt Kawahara of the Houston Chronicle reports.

McCullers (forearm) has begun throwing off the slope of the mound in recent days, MLB.com reports.

The Astros placed McCullers (elbow) on the 60-day injured list Thursday, Brian McTaggart of MLB.com reports.

McCullers (forearm) said Monday that he's aiming to make his season debut in "late June, early July" Chandler Rome of The Athletic reports.

McCullers (forearm) said Saturday that he expects to return toward the end of the summer, Chandler Rome of The Athletic reports.

Astros general manager Dana Brown said Tuesday that McCullers (forearm) might not be ready to pitch again until early July of 2024, Chandler Rome of The Athletic reports.

McCullers underwent season-ending surgery Tuesday to repair a torn right flexor tendon and remove a bone spur from his right forearm, Chandler Rome of The Athletic reports.

McCullers (forearm) will get an MRI on Friday after reporting discomfort, Julia Morales of AT&T SportsNet Southwest reports.

Astros manager Dusty Baker said Monday that McCullers (forearm) is no longer throwing off a mound, Chandler Rome of The Athletic reports. "We have to take it slow with Lance until we know that he's 100 percent. That's where it is right now," Baker said.

General manager Dana Brown said Sunday that McCullers (forearm) isn't expected to return from the injured list until "somewhere closer to the All-Star break, or after," Brian McTaggart of MLB.com reports.