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Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
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Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023
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Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
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Boston Red Sox Archives - SportsPro
Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023
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Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
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Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
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