MassMutual is first jersey patch sponsor of the Red Sox

Boston Red Sox sign BetMGM as first betting sponsor

St. Louis Cardinals land Stifel as first jersey patch sponsor

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

Red Sox Reportedly Strike $170M Jersey Patch Deal

Red Sox reveal 2023 uniform change

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

John Hancock ending long-held Boston Red Sox sponsorship

Detroit Tigers to add Meijer patch on jerseys

Red Sox, MassMutual Partner Up

MLB Sponsor Revenue Hits $1.2B as Jersey Patch Boom Awaits –