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

jerseys – Blogging the Red Sox

Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe

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

Jennifer Halloran posted on LinkedIn

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

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

uniforms – Blogging the Red Sox

Why are the Angels wearing jersey patches with 'FBM' on them? - Los Angeles Times

MLB's Rangers hire CSM to find first jersey patch sponsor - Sportcal

Yankees Announce Starr Insurance Jersey Patch, Partnership in Video, News, Scores, Highlights, Stats, and Rumors

Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023

Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe

jerseys – Blogging the Red Sox

Fenway Sports Management