Description:June 21, 1950 Willie Mays Birmingham Black Barons Conditional Assignment Agreement: One page (front and back) document regarding the contractual assignment of Willie Mays from the Birmingham Black Barons to the Minneapolis Millers who were the Minor League affiliate for the San Francisco Giants. The agreement features fairly lengthy typewritten details within the central portion regarding the fact that the Birmingham Black Barons had a valid contract with Willie Mays and were agreeing to transfer said contract to the Minneapolis club for $10,000. Light general surface wear. certificate of provenance from the Willie Mays Collection: EX