MassMutual is first jersey patch sponsor of the Red Sox

FIRST LOOK: sponsor patches on 2023 MLB jerseys

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

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

MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal

Red Sox reportedly sign jersey patch deal with MassMutual

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

Red Sox play ball with a new signature sponsor - BOStoday

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