Lou Clarizio was one of the six white professional baseball players signed to play in the Negro Leagues, the second ever signed. He played in the Negro American League. He was signed to the Chicago American Giants in 1950 by Ted "Double Duty" Radcliffe with the support of the team’s owner, Dr. J. B. Martin, who was concerned about black players joining Major League teams.
References
Lou Clarizio Wikipedia(Text) CC BY-SA