Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Boston Red Sox sign BetMGM as first betting sponsor
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MassMutual becomes 'signature sponsor' for Boston Red Sox
Red Sox reach $170 million jersey-patch deal, Mets also interested
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MassMutual lands deal for patch on Red Sox uniforms; Springfield company's deal with $17M yearly (report)
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
Houston Astros reveal Oxy as first ever jersey partner - SportsPro
Red Sox play ball with a new signature sponsor - BOStoday
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