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Red Sox play ball with a new signature sponsor - BOStoday
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MLB uniforms will have advertising beginning in the 2023 season - The Boston Globe
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Red Sox uniforms will be unaffected by new MLB rules in 2023
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Chris Cotillo on X: MassMutual is the new “signature partner” of the Red Sox. They get a jersey patch and the sign that replaces the John Hancock sign in center field. /
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MassMutual is first jersey patch sponsor of the Red Sox
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MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
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MassMutual logo patches
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Boston Red Sox Announce MassMutual Patch on Jerseys Starting in 2023 – SportsLogos.Net News
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Red Sox reportedly sign jersey patch deal with MassMutual
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Red Sox Mass Mutual Collaboration – NBC Boston