Mo Harris (baseball)Raymond Harold Harris, nicknamed "Mo", was an American Negro league second baseman between 1918 and 1931.Early life and careerA native of Allegheny City, Pennsylvania, Harris attended Allegheny High School. He made his Negro leagues debut with the Homestead Grays in 1918. Harris played several seasons with the Grays through 1929, then finished his playing career with the Pittsburgh Crawfords in 1931. After his playing days, he went on to enjoy a long umpiring career in the Negro National League. Harris died in Pittsburgh, Pennsylvania in 1964 at age 66.