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Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
MLB's new uniform rules won't prevent Red Sox from keeping Boston
MLB Teams with Jersey Patch Sponsors for the 2023 Season - Zoomph
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MassMutual is first jersey patch sponsor of the Red Sox
Red Sox debut new uniform advertisements as part of 10-year deal
MLB Jersey Patch Market Warming Up As Season Approaches
Red Sox reveal first-ever uniform advertisements; MassMutual