MassMutual is first jersey patch sponsor of the Red Sox

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

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

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Red Sox Reportedly Strike $170M Jersey Patch Deal

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

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

A $17 million annual deal by the Red Sox stokes debate on the value of jersey patches in a market flooded with options

MassMutual is first jersey patch sponsor of the Red Sox