MassMutual will be the first sponsor to have its logo on Red Sox

The Boston Red Sox announced a major off-the-field partnership with MassMutual

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

MassMutual logo patches

Red Sox Mass Mutual Collaboration – NBC Boston

FIRST LOOK: sponsor patches on 2023 MLB jerseys

Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports

News: CMO of the Week: MassMutual's Jennifer Halloran

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

Red Sox play ball with a new signature sponsor - BOStoday

Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023

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

Red Sox All-Star Break Awards. Plus, Jaylen's Place Among No. 2 Options. - The Ringer