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Ten-year partnership sees the insurer become the MLB team's first jersey patch partner.
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro
Boston Red Sox recall infielder Bobby Dalbec and left-hander Chris
Red Sox can't stay away from injury bug, Brayan Bello returns
MassMutual will be the first sponsor to have its logo on Red Sox
Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports
MassMutual will be the first sponsor to have its logo on Red Sox
Balls and Strikes on the MassMutual sign - marketing masterclass! : r/redsox
Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro
Red Sox improve to 5-1 vs. Yankees thanks to Brayan Bello
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe