Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Sports betting will make its way to Fenway's Green Monster - Boston Business Journal
MassMutual becomes 'signature sponsor' for Boston Red Sox
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MassMutual will be advertising on the Red Sox jersey in 2023. - Over the Monster
MLB's new uniform rules won't prevent Red Sox from keeping Boston traditions – Boston Herald
Boston Red Sox land a 10-year partnership with MassMutual
Red Sox will have MassMutual logo on their jerseys beginning in 2023 – Blogging the Red Sox
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The Boston Red Sox announced a major off-the-field partnership with MassMutual – Boston 25 News
Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023