Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

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

MassMutual, Red Sox announce multiyear partnership

Red Sox reach $170 million jersey-patch deal, Mets also interested

Marcus Smart loving Trevor Story, Franchy Cordero wearing his 36 as Red Sox wear Celtics jerseys on plane to Chicago

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

Red Sox play ball with a new signature sponsor - BOStoday

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

Boston Red Sox Archives - SportsPro

MassMutual lands deal for patch on Red Sox uniforms; Springfield company's deal with $17M yearly (report)

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