MassMutual is first jersey patch sponsor of the Red Sox
SBJ Closing Bell: Red Sox officially sign MassMutual as patch sponsor
Red Sox reportedly sign jersey patch deal with MassMutual
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
Boston Red Sox make history with record $170 million ad-patch deal, other teams to follow suit
San Francisco Giants, Oakland A's swing for millions from uniform-patch deals - San Francisco Business Times
FOS PM: Google Bids on Sunday Ticket - Front Office Sports
Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023
MLB's Rangers hire CSM to find first jersey patch sponsor - Sportcal
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe