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

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

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

Cleveland Guardians Announce Jersey Sponsorship - Sports Illustrated Cleveland Guardians News, Analysis and More

Red Sox Sign Japanese Batting Champ Yoshida - Rafu Shimpo

Red Sox to sport MassMutual logo under new partnership - Boston Business Journal

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

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

Logos and uniforms of the Boston Red Sox - Wikipedia

Colorful jerseys here to stay: Red Sox president says team not planning future uniform changes, Sports

Tom Caron: Time is running out for Red Sox to make playoff push

Red Sox reach $170 million jersey-patch deal, Mets also interested

Devers breaks tie in 6-run 8th, Red Sox beat Reds 8-2 to avoid sweep