MassMutual is first jersey patch sponsor of the Red Sox

Red Sox play ball with a new signature sponsor - BOStoday

MLB uniforms will have advertising beginning in the 2023 season - The Boston Globe

Red Sox uniforms will be unaffected by new MLB rules in 2023

Chris Cotillo on X: MassMutual is the new “signature partner” of the Red Sox. They get a jersey patch and the sign that replaces the John Hancock sign in center field. /

MassMutual is first jersey patch sponsor of the Red Sox

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

MassMutual logo patches

Boston Red Sox Announce MassMutual Patch on Jerseys Starting in 2023 – SportsLogos.Net News

Red Sox reportedly sign jersey patch deal with MassMutual

Red Sox Mass Mutual Collaboration – NBC Boston