MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Check Out New Photos Of Red Sox Partnership Jersey Patch
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
Larger-Than-Life Drone Show Celebrates MassMutual's Sponsorship of the Boston Red Sox
Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports
Boston Red Sox make history with record $170 million ad-patch deal, other teams to follow suit
MLB's Detroit Tigers expand Meijer sponsorship with jersey patch deal
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
I'm glad the Phillies didn't put sponsors on their jerseys. It looks so cheap. : r/phillies