MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
MassMutual lands deal for patch on Red Sox uniforms; Springfield
Red Sox will not be affected by MLB's new uniform rules in 2023
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MassMutual will be advertising on the Red Sox jersey in 2023
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Boston Red Sox sign BetMGM as first betting sponsor
Red Sox to sport MassMutual logo under new partnership - Boston
MassMutual logo patches
Devers breaks tie in 6-run 8th, Red Sox beat Reds 8-2 to avoid
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MassMutual, Red Sox announce multiyear partnership
MLB Teams with Jersey Patch Sponsors for the 2023 Season - Zoomph
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