MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Iconic Massachusetts Brands Unite: MassMutual Named Signature
MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal
Colorful jerseys here to stay: Red Sox president says team not
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Boston Red Sox sign BetMGM as first betting sponsor
Red Sox will not be affected by MLB's new uniform rules in 2023
