NYSportsJournalism.com - NY Yankees Sign $220M Partner, Jersey Patch Deal - Yankees Sign $200M Signature Partner, Sleeve Patch Deal With Starr Insurance
Boston Red Sox Sign Long-Term Jersey Sponsor - Ministry of Sport
Boston Red Sox and Springfield-based life insurer, MassMutual partner up
Red Sox play ball with a new signature sponsor - BOStoday
Agenda Archives - BusinessWest
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Boston Red Sox sign BetMGM as first betting sponsor
MassMutual is first jersey patch sponsor of the Red Sox
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal