Boston Red Sox 'push the envelope' with marathon-inspired blue-yellow uniforms - ESPN
Red Sox Drop Trademark Applications for Boston –
MassMutual is first jersey patch sponsor of the Red Sox
2021 Boston Red Sox Uniform Tracker, Sports
Red Sox snag comeback win in blue-and-yellow uniforms
Boston Red Sox jersey and uniform history through the years
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Red Sox Uniforms Facts and Trivia - New England
Colorful jerseys here to stay: Red Sox president says team not planning future uniform changes, Sports
Why the Red Sox are wearing their yellow uniforms