Red Sox MassMutual (2 versions). This is an advertising patch. The Red Sox have two versions of this patch. One is navy with white writing and the
John Hancock ending longtime partnership with Boston Red Sox – Boston 25 News
Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023
2023 Boston Red Sox MassMutual Advertising Jersey Patch - White
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro
What's New in MLB Logos and Uniforms for 2023 – SportsLogos.Net News
Boston Red Sox Announce MassMutual Patch on Jerseys Starting in 2023 – SportsLogos.Net News
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
MassMutual lands deal for patch on Red Sox uniforms; Springfield company's deal with $17M yearly (report)