SEATTLE -- Mariners pitcher Taijuan Walker had surgery Monday to remove a bone fragment from his right ankle. He is one of three Seattle pitchers to undergo surgery since the end of the regular season.

Walker is expected to start rehabbing immediately and should be ready for the start of spring training. He was bothered in the second half of the season by ankle and foot issues, including a stint on the disabled list.

Reliever Steve Cishek underwent surgery last week to repair a torn labrum in his left hip. His rehab is expected to take four to six months, putting his status for the start of spring training in question.

Reliever Tony Zych had surgery last week on his right shoulder. A right-hander, Zych had a biceps tendon transfer, and the team said the surgery did not involve the rotator cuff or the capsule in the shoulder. He is expected to be ready for the start of spring training.