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

Red Sox Sign Japanese Batting Champ Yoshida - Rafu Shimpo

Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

Red Sox accidentally picked Yankees fan to sponsor jerseys for next decade

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

Chris Cotillo on X: MassMutual is the new “signature partner” of the Red Sox. They get a jersey patch and the sign that replaces the John Hancock sign in center field. /

Red Sox play ball with a new signature sponsor - BOStoday

Boston Red Sox and Springfield-based life insurer, MassMutual partner up

MassMutual is first jersey patch sponsor of the Red Sox

Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox

Red Sox will have MassMutual logo on their jerseys beginning in 2023 – Blogging the Red Sox

Boston Red Sox's Narciso Crook talks growing up in Trenton, his favorite local eateries, and the secrets of his success – Trenton Journal

Legendary MLB teams break marketing ground with insurance sponsors - Insurance News

Brewers sign former Red Sox outfielder Raimel Tapia