Why are the Angels wearing jersey patches with 'FBM' on them? - Los Angeles Times
Boston Red Sox make history with record $170 million ad-patch deal, other teams to follow suit
MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal
Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
MLB Sponsor Revenue Hits $1.2B as Jersey Patch Boom Awaits –
What MLB teams will have uniform ad patches in 2023?
Red Sox reach $170 million jersey-patch deal, Mets also interested
Logos and uniforms of the Boston Red Sox - Wikipedia