José Buttó To Undergo Procedure For Blood Clot

Giants reliever José Buttó has a blood clot in his throwing arm, the team told reporters (via Alex Pavlovic of NBC Sports Bay Area). He’s undergoing a procedure this evening to remove it.

Buttó landed on the 15-day injured list yesterday. The team initially announced that only as arm fatigue. The clot provides a little more clarity, but there’s no return timeline. Susan Slusser of The San Francisco Chronicle relays that it appears Buttó had pitched through the issue for a while before the clot was diagnosed earlier today.

Blood clotting can be associated with thoracic outlet syndrome. That was the case for Phillies ace Zack Wheeler, for example. The Giants have not said anything about whether that’s a fear for Buttó. However, skipper Tony Vitello told Slusser there are a few possible procedures that the right-hander might undergo.

San Francisco acquired Buttó from the Mets as one of three players in the Tyler Rogers deal last summer. Blade Tidwell, another part of the Rogers return, was coincidentally recalled to take his place in the bullpen yesterday. Buttó turned in a 4.50 ERA across 20 innings down the stretch. He surrendered five runs on six hits and four walks over two innings to begin the 2026 season.