The Giants optioned Walker to Triple-A Sacramento on Sunday, Alex Pavlovic of NBC Sports Bay Area reports.
Giants manager Tony Vitello has yet to settle on a full-time closer, but Walker took himself out of consideration for save chances after a string of poor performances. Over his last four appearances, the right-hander blew two saves and gave up seven earned runs on nine hits and four walks over 3.1 innings, inflating his ERA to 6.46 and his WHIP to 1.89 on the season. Walker will be sent to Triple-A for a reset, and if he's able to rediscover the form he showed in his 2024 breakout, he may not have to wait long for a call-up.