Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports
MassMutual is first jersey patch sponsor of the Red Sox
Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
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Boston Red Sox land a 10-year partnership with MassMutual
Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox
NYSportsJournalism.com - Home
Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro