Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Boston Red Sox sign BetMGM as first betting sponsor
It's come to this: our Red Sox as human billboards
Houston Astros reveal Oxy as first ever jersey partner - SportsPro
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Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox
20160115 xbs wit by The Island 360 - Issuu
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe