MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe

Red Sox to sport MassMutual logo under new partnership - Boston Business Journal

Phillies may have sponsored uniform patch this season

MassMutual logo patches

MLB Team Sponsorship Revenue Grew To $1.5 Billion In 2023, Report Shows

Red Sox to sport MassMutual logo under new partnership - Boston Business Journal

Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal

Red Sox will not be affected by MLB's new uniform rules in 2023

MLB's announced jersey patch deals so far-San Diego Padres: Motorola. Boston Red Sox: MassMutual. Los Angeles Angels: Foundation Building Materials. Arizona Diamondbacks: Avnet : r/baseball

The Boston Red Sox starting pitching will turn things around

Red Sox accidentally picked Yankees fan to sponsor jerseys for next decade