MassMutual will be the first sponsor to have its logo on Red Sox

Red Sox play ball with a new signature sponsor - BOStoday

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

John Hancock ending long-held Boston Red Sox sponsorship

Cleveland Guardians Announce Jersey Sponsorship - Sports Illustrated Cleveland Guardians News, Analysis and More

Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal

Red Sox Reportedly Strike $170M Jersey Patch Deal

Boston Red Sox bag US$170m MassMutual jersey patch deal, says report - SportsPro

MLB Teams with Jersey Patch Sponsors for the 2023 Season - Zoomph

Boston Red Sox make history with record $170 million ad-patch deal, other teams to follow suit