Twins making careful decision about ad patches on players' jerseys
Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
jerseys – Blogging the Red Sox
MLB Sponsor Revenue Hits $1.2B as Jersey Patch Boom Awaits –
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox
Why MassMutual invested in a jersey sponsorship with the Red Sox
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
Red Sox Mass Mutual Collaboration – NBC Boston
Phillies may have sponsored uniform patch this season