Giancarlo Stanton has suffered a new left calf strain while recovering from a right calf injury, leaving his return for the 2026 season in serious doubt. The setback is significant for the New York Yankees because the veteran slugger had been targeting an early-September comeback and may now miss the remainder of the campaign.

Stanton, 36, injured his left calf after falling while running the bases during rehabilitation. Yankees manager Aaron Boone described the injury as “moderate grade” and said the club was not ruling out a return, but acknowledged that making him available this season would be challenging.