MassMutual is first jersey patch sponsor of the Red Sox
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
For the first time, historic Boston Red Sox jersey will have a sponsor patch
Houston Astros reveal Oxy as first ever jersey partner - SportsPro
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
Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
MassMutual, Red Sox announce multiyear partnership
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe