John Jordan "Buck" O'Neil Jr. was an American first baseman and manager in the Negro American League, mostly with the Kansas City Monarchs. After his playing days, he worked as a scout and became the first African American coach in Major League Baseball. In his later years he became a popular and renowned speaker and interview subject, helping to renew widespread interest in the Negro leagues, and played a major role in establishing the Negro Leagues Baseball Museum in Kansas City, Missouri. He was elected to the Baseball Hall of Fame in 2022 as an executive.

The Kansas City Monarchs were the longest-running franchise in the history of baseball's Negro leagues. Operating in Kansas City, Missouri, and owned by J. L. Wilkinson, they were charter members of the Negro National League from 1920 to 1930. J. L. Wilkinson was the first white owner at the time of the establishment of the team. In 1930, the Monarchs became the first professional baseball team to use a portable lighting system which was transported from game to game in trucks to play games at night, five years before any MLB team did. The Monarchs won ten league championships before integration, and triumphed in the first Negro League World Series in 1924. The Monarchs had only one season in which they did not have a winning record. The team produced more major league players than any other Negro league franchise. It was disbanded in 1965.