Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

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MassMutual lands deal for patch on Red Sox uniforms; Springfield company's deal with $17M yearly (report)

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

Boston Red Sox Archives - SportsPro

Houston Astros reveal Oxy as first ever jersey partner - SportsPro

Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro

Hc 011516 by The Island 360 - Issuu

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

Rt 011516 by The Island 360 - Issuu

Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023