McCullers, who struggled last season with a fastball that rarely exceeded 91 mph and had difficulty locating his sinker and four‑seam fastball, returned to the mound on Friday at Angel Stadium.
In his debut, he threw eight pitches, including a 93.2‑mph four‑seam fastball, and demonstrated improved command, giving the Astros a glimmer of hope for his role in the upcoming season.