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MLB franchise the Boston Red Sox agree ten-year partnership with Massachusetts-based insurance company MassMutual.
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
MassMutual will be the first sponsor to have its logo on Red Sox
Red Sox Rolling With City Connect Uniforms; 'We Love These Unis
The Red Sox need new alternate uniforms - Over the Monster
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
MassMutual becomes 'signature sponsor' for Boston Red Sox
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe