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

Red Sox kicks off plan to bring all BPS 6th graders to Fenway Park

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. /

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

Boston Red Sox Announce MassMutual Patch on Jerseys Starting in 2023 – SportsLogos.Net News

MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal

Why are the Angels wearing jersey patches with 'FBM' on them? - Los Angeles Times

FIRST LOOK: sponsor patches on 2023 MLB jerseys

MLB Opening Day: Jersey Patches - Foul Or Fair Game?

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