MassMutual is first jersey patch sponsor of the Red Sox
Red Sox Wear Yellow, Nike Launches New MLB City Connect Uniform Series for 2021 – SportsLogos.Net News
MLB's new uniform rules won't prevent Red Sox from keeping Boston traditions – Boston Herald
Boston Red Sox jersey and uniform history through the years
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Boston Red Sox: A New England Obsession Poster by Nola McConnan and William Band – The Black Art Depot
Lots of red and blue: Why are the Red Sox wearing their alternate jerseys more often? - The Athletic
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Red Sox unveil yellow jerseys as part of 'City Connect' venture with Nike - The Boston Globe