Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

The Boston Red Sox announced a major off-the-field partnership

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MassMutual becomes 'signature sponsor' for Boston Red Sox

MassMutual, Red Sox announce multiyear partnership

Houston Astros reveal Oxy as first ever jersey partner - SportsPro

Boston Red Sox land a 10-year partnership with MassMutual

Red Sox, MassMutual Partner Up

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Red Sox reveal first-ever uniform advertisements; MassMutual

Red Sox play ball with a new signature sponsor - BOStoday

Red Sox, MassMutual near a $17M jersey patch deal - Boston

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