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

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

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

MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal

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

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