MassMutual is first jersey patch sponsor of the Red Sox

Red Sox reportedly sign jersey patch deal with MassMutual

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

The Boston Red Sox announced a major off-the-field partnership with MassMutual – Boston 25 News

MassMutual will be advertising on the Red Sox jersey in 2023. - Over the Monster

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

Red Sox uniforms will be unaffected by new MLB rules in 2023

Boston Red Sox make history with record $170 million ad-patch deal, other teams to follow suit

MLB's new uniform rules won't prevent Red Sox from keeping Boston traditions – Boston Herald

Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

L.A. Angels have new MLB jersey patch sponsorship

Boston Red Sox sign BetMGM as first betting sponsor

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

Astros agree to deal to add Oxy jersey patch for 2023 season

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