MassMutual is first jersey patch sponsor of the Red Sox
Yankees Jersey Patch Deal Is MLB's Richest at $25M a Year
MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal
The Boston Red Sox announced a major off-the-field partnership
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MassMutual is first jersey patch sponsor of the Red Sox
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MassMutual will be advertising on the Red Sox jersey in 2023