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Ken Madsen on LinkedIn: Great spending the day at the “New Balance” headquarters in Boston…
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Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
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Why MassMutual invested in a jersey sponsorship with the Red Sox
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Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports
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MLB Jersey Patch Market Warming Up As Season Approaches
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Logos and uniforms of the Boston Red Sox - Wikipedia
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Cleveland Guardians to wear Marathon jersey patch
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MassMutual lands deal for patch on Red Sox uniforms; Springfield company's deal with $17M yearly (report)
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Colorful jerseys here to stay: Red Sox president says team not planning future uniform changes, Sports
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Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023