MassMutual is first jersey patch sponsor of the Red Sox

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

Boston Red Sox sign BetMGM as first betting sponsor

Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro

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

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

Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro

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

Cleveland Guardians to wear Marathon jersey patch

Red Sox Mass Mutual Collaboration – NBC Boston

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