MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe

MassMutual, Red Sox announce multiyear partnership

MassMutual will be advertising on the Red Sox jersey in 2023. - Over the Monster

Milliken's Red Sox recap - Mariners 10, Red Sox 1

Ex-Yankees pitchers destined to miss Red Sox Opening Day

Red Sox Sign Japanese Batting Champ Yoshida - Rafu Shimpo

Official Charity of the Boston Red Sox Red Sox Foundation - Red Sox Foundation

MLB's new uniform rules won't prevent Red Sox from keeping Boston traditions – Boston Herald

MassMutual is first jersey patch sponsor of the Red Sox

Red Sox Mass Mutual Collaboration – NBC Boston

It's come to this: our Red Sox as human billboards

MORE