San Francisco Giants reliever José Butto underwent surgery Friday to remove a blood clot from his right arm [1, 2, 4].

The loss of the right-handed pitcher creates a void in the Giants' bullpen during a critical phase of the season. Because the procedure targeted Butto's throwing arm, the recovery timeline is vital for the team's pitching depth and rotation management.

Butto underwent the procedure on April 3, 2024 [6], at Stanford Medical Center in Stanford, California [1, 2]. The surgery was performed by Dr. Jason Lee [5]. The team said his status on Saturday following the operation [1, 3].

Reports on the recovery timeline vary. The Associated Press and ESPN report that Butto is expected to miss five to six months [1, 2]. However, other reports from Yahoo Sports and MSN suggest a shorter recovery window of two to four months [3, 4].

This discrepancy in timing leaves Butto's availability for the remainder of the year uncertain. While some projections suggest a return later in the season, MLB.com reports that Butto could miss the rest of the 2026 season [3].

The Giants have not yet specified which pitcher will take over Butto's specific role in the bullpen. The team continues to monitor the recovery process at Stanford Medical Center as the pitcher begins rehabilitation.

José Butto underwent surgery Friday to remove a blood clot from his right arm

The uncertainty regarding Butto's recovery timeline, ranging from two to six months, forces the Giants to rely on their farm system or trade market to stabilize the bullpen. A blood clot in a throwing arm is a serious medical event that requires strict adherence to rehabilitation to avoid recurrence, making a premature return risky for the athlete's long-term health.