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

Final Red Sox homestand of the year is one of lasts – Boston 25 News

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

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

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

MassMutual lands deal for patch on Red Sox uniforms; Springfield company's deal with $17M yearly (report)

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

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

MLB Teams with Jersey Patch Sponsors for the 2023 Season - Zoomph

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

MLB Team Sponsorship Revenue Grew To $1.5 Billion In 2023, Report Shows

MassMutual is first jersey patch sponsor of the Red Sox

MLB Jersey Patch Market Warming Up As Season Approaches

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