Getty Mike Yastrzemski celebrates hitting a solo home run against the Arizona Diamondbacks on September 03, 2024. On Thursday July 31, 2025, the San Francisco Giants traded away fan favorite outfielder Mike Yastrzemski to the Kansas City Royals , closing the book on a storied chapter for both Yaz and the Giants.    Yastrzemski, 34, played for the Giants for seven seasons from 2019-2025. He was a fan favorite in the City by the Bay, as much for his late inning heroics as the way he always gave