Elijah Jerry "Pumpsie" Green becomes the first African-American to play for the Boston Red Sox, the last team to integrate. He came in as a pinch runner for Vic Wertz and stayed in as shortstop in a 2–1 loss to the Chicago White Sox.

Elijah Jerry "Pumpsie" Green was an American Major League Baseball (MLB) infielder who played with the Boston Red Sox (1959–62) and New York Mets (1963). A switch-hitter who threw right-handed, he was listed as 6 ft (1.83 m) tall and 175 lb (79 kg).

African Americans are an ethnic group in the United States. The first achievements by African Americans in diverse fields have historically marked footholds, often leading to more widespread cultural change. The shorthand phrase for this is "breaking the color barrier".

The Boston Red Sox are an American professional baseball team based in Boston. The Red Sox compete in Major League Baseball (MLB) as a member club of the American League (AL) East Division. Founded in 1901 as one of the American League's eight charter franchises, the team's home ballpark has been Fenway Park since 1912. The "Red Sox" name was chosen by the team owner, John I. Taylor, c. 1908, following the lead of previous teams that had been known as the "Boston Red Stockings", including the Boston Braves. The team has won nine World Series championships, tied for the third-most of any MLB team, and has played in thirteen World Series. Their most recent World Series appearance and win was in 2018. In addition, they won the 1904 American League pennant, but were not able to defend their 1903 World Series championship when the New York Giants refused to participate in the 1904 World Series.

In baseball or softball, a pinch runner is a player substituted into a game for the purpose of base running.