MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe

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Fenway Sports Management

Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023

Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

Red Sox play ball with a new signature sponsor - BOStoday

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

MLB Team Sponsorship Revenue Grew To $1.5 Billion In 2023, Report Shows

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

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

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

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