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MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal
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L.A. Angels have new MLB jersey patch sponsorship
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MassMutual will be advertising on the Red Sox jersey in 2023. - Over the Monster
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Check Out New Photos Of Red Sox Partnership Jersey Patch
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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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Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023
![MassMutual is first jersey patch sponsor of the Red Sox](https://upload.wikimedia.org/wikipedia/commons/9/9a/Manny_Ramirez_with_Red_Sox_June_2007.jpg)
Logos and uniforms of the Boston Red Sox - Wikipedia
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Phillies may have sponsored uniform patch this season
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Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports
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The Boston Red Sox announced a major off-the-field partnership with MassMutual – Boston 25 News