Born in Miami, Florida, Pratt received his bachelor's degree from Clark College (Atlanta, Georgia) and his master's in social work from Atlanta University. He worked for the Urban League in Cleveland, Ohio, and Kansas City, Missouri, before arriving in Seattle in 1956 to be the Seattle league's Community Relations Secretary.
Pratt was born in Miami, Florida, where he earned his bachelor's degree from Clark College (Atlanta, Georgia) and his master's in social work from Atlanta University. He worked for the Urban League in Cleveland, Ohio, and Kansas City, Missouri, prior to moving to Seattle in 1956 to serve as the Community Relations Secretary of the Seattle league.