Proud Partner of the Boston Red Sox
MassMutual will be the first sponsor to have its logo on Red Sox
Red Sox to sport MassMutual logo under new partnership - Boston
Houston Astros reveal Oxy as first ever jersey partner - SportsPro
Red Sox play ball with a new signature sponsor - BOStoday
Iconic Massachusetts Brands Unite: MassMutual Named Signature
Sox say so long to John Hancock. But hello maybe to MassMutual
Red Sox to sport MassMutual logo under new partnership - Boston
Proud Partner of the Boston Red Sox
Red Sox play ball with a new signature sponsor - BOStoday
Boston Red Sox top prospect Marcelo Mayer belts first professional