MassMutual is first jersey patch sponsor of the Red Sox
Red Sox play ball with a new signature sponsor - BOStoday
Houston Astros reveal Oxy as first ever jersey partner - SportsPro
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
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
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal