MassMutual is first jersey patch sponsor of the Red Sox
Red Sox accidentally picked Yankees fan to sponsor jerseys for next decade
John Hancock ending long-held Boston Red Sox sponsorship
Red Sox play ball with a new signature sponsor - BOStoday
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MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal
Why MassMutual invested in a jersey sponsorship with the Red Sox
St. Louis Cardinals land Stifel as first jersey patch sponsor
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox
Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro
Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox