Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Red Sox reveal first-ever uniform advertisements; MassMutual
Boston Red Sox Archives - SportsPro
MassMutual is first jersey patch sponsor of the Red Sox
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Proud Partner of the Boston Red Sox
MassMutual will be the first sponsor to have its logo on Red Sox
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20160115 xbs wit by The Island 360 - Issuu
Boston Red Sox Archives - SportsPro
20160115 xbs wit by The Island 360 - Issuu
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