MassMutual is first jersey patch sponsor of the Red Sox
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
The Boston Red Sox announced a major off-the-field partnership with MassMutual – Boston 25 News
Red Sox will have MassMutual logo on their jerseys beginning in 2023
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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
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 to sport MassMutual logo under new partnership - Boston Business Journal
MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal