MassMutual is first jersey patch sponsor of the Red Sox

Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports

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

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

Red Sox Reportedly Strike $170M Jersey Patch Deal

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

Astros agree to deal to add Oxy jersey patch for 2023 season

Red Sox reportedly sign jersey patch deal with MassMutual

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

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

Red Sox Mass Mutual Collaboration – NBC Boston

Why are the Angels wearing jersey patches with 'FBM' on them? - Los Angeles Times

Red Sox accidentally picked Yankees fan to sponsor jerseys for next decade

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