Harold "Hal" Willard Bradley Sr. (September 27, 1905 – November 30, 1973) was an American football player for the Chicago Cardinals in 1928. Bradley was one of only 13 African-Americans to play in the National Football League prior to World War II and just the second African-American lineman in the history of the NFL, following Duke Slater. He played collegiately at the University of Iowa in 1926 and was the father of Harold Bradley Jr., who also played in the NFL.