MassMutual will be the first sponsor to have its logo on Red Sox
Boston Red Sox top prospect Marcelo Mayer belts first professional
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Proud Partner of the Boston Red Sox
Red Sox reach $170 million jersey-patch deal, Mets also interested
Boston Red Sox sign BetMGM as first betting sponsor
Red Sox, MassMutual Partner Up
MassMutual will be advertising on the Red Sox jersey in 2023
For the first time, historic Boston Red Sox jersey will have a
Boston Red Sox bag US$170m MassMutual jersey patch deal, says