 Marshall's Redskins had a strong following in that part of the country, which he vigorously defended, and he stood up against the NFL's efforts to put expansion teams in the South until Clint Murchison, Jr.'s successful extortion attempt (Murchison acquired the rights to the Redskins' fight song and threatened not to let Marshall use the song unless he got an expansion team in Dallas) led to the establishment of the Dallas Cowboys in 1960.By 1934, there were no more black players in the league.The NFL did not have another black player until after World War II.