The color red has been used in the names and commonly in the uniforms of several professional baseball teams in Boston, Massachusetts.
- Boston's first professional baseball club was established 1871 by Boston businessman Ivers Whitney Adams, and was nicknamed the Boston Red Stockings. Player-manager Harry Wright was brought to Boston to manage Boston's first-ever baseball team by Adams. He brought the nickname, the eponymous uniform, and three teammates from the Cincinnati Red Stockings when the Ohio team folded.
- The Atlanta Braves of the National League (active in 2009) are that Boston ballclub (established 1871) after a few name changes and two relocations.
- The Boston Reds of the Union Association in 1884. The team was also called the "Unions".
- The Boston Red Stockings of the Players League in 1890 and the American Association in 1891. The team was called "Reds" more often than "Red Stockings".
- The Boston Red Sox, established 1901 and active in 2009. The club adopted the name "Red Sox" in 1908 after their intra-city rivals temporarily dropped the red trim from their uniforms. They were called "Red Sox" from that time, never "Red Stockings" or "Reds".