MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Logos and uniforms of the Boston Red Sox - Wikipedia
Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Changes Likely Coming to Red Sox' Uniforms Sometime in Near Future – Blogging the Red Sox
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Red Sox Barbie Jersey, Navy
Lots of red and blue: Why are the Red Sox wearing their alternate jerseys more often? - The Athletic
Bruins players wear vintage Red Sox uniforms before Winter Classic
MLB green lights Red Sox' yellow jerseys for playoffs
Red Sox and Yankees' 1912 Uniforms Will Provide Historic Atmosphere to Fenway, News, Scores, Highlights, Stats, and Rumors
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Colorful jerseys here to stay: Red Sox president says team not planning future uniform changes, Sports