Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

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

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

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

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

Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

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

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

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

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