Utilityman Shawn O’Malley was scheduled to undergo an emergency appendectomy Tuesday night after being hospitalized earlier in the day because of severe stomach cramps.
The Mariners had few other details.
O’Malley, 29, was one of two leading candidates, along with Taylor Motter, to break camp as the Mariners’ utilityman.
The recovery period from an appendectomy varies, but patients with no unexpected complications are generally able to resume full activities within three weeks.
The Mariners break camp after their April 1 game against Colorado at Salt River Fields in Scottsdale and open the regular season two days later in Houston.