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Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
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Houston Astros reveal Oxy as first ever jersey partner - SportsPro
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
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Boston Red Sox land a 10-year partnership with MassMutual
Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023
Red Sox Mass Mutual Collaboration – NBC Boston
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