Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
MassMutual lands deal for patch on Red Sox uniforms; Springfield
SBJ Closing Bell: Red Sox officially sign MassMutual as patch sponsor
Boston Red Sox land a 10-year partnership with MassMutual
Red Sox reportedly sign jersey patch deal with MassMutual
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MassMutual will be the first sponsor to have its logo on Red Sox
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MassMutual becomes 'signature sponsor' for Boston Red Sox
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Sustainability and Inclusion MassMutual 2022 Annual Report