What MLB teams will have uniform ad patches in 2023?
Boston Red Sox and Springfield-based life insurer, MassMutual partner up
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
Red Sox reportedly sign jersey patch deal with MassMutual
MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal
Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
Larger-Than-Life Drone Show Celebrates MassMutual's Sponsorship of the Boston Red Sox
Boston Red Sox Announce MassMutual Patch on Jerseys Starting in 2023 – SportsLogos.Net News
MLB Jersey Patch Market Warming Up As Season Approaches
Red Sox play ball with a new signature sponsor - BOStoday
Why are the Angels wearing jersey patches with 'FBM' on them? - Los Angeles Times