 With the exception of those two games by Bradley, Duke Slater was the only African-American in the NFL from 1927-1929.Slater’s streak of five straight all-pro appearances was broken in 1928, when the Cardinals played just a six-game schedule; after the season, Cardinals owner Chris O'Brien sold the team to Chicago physician Dr. David Jones.Jones purged the Cardinals roster in 1929, bringing back just four players from the previous season, but Slater – once again the only black player in the NFL – was one of four Cardinals to return.