Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

Boston Red Sox Archives - SportsPro

Red Sox to sport MassMutual logo under new partnership - Boston Business Journal

Houston Astros reveal Oxy as first ever jersey partner - SportsPro

Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe

NYSportsJournalism.com - Home

Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe

NYSportsJournalism.com - Home

Marcus Smart loving Trevor Story, Franchy Cordero wearing his 36 as Red Sox wear Celtics jerseys on plane to Chicago

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