[1] The agreement included provisions to respect the player reserve lists of clubs in each league.[2][3] It did not include Negro league baseball, and was racially segregated by "gentleman's agreement" until 1947.Within the United States, the most notable major outlaw league was the Federal League of 1914–1915, which lured players away from their established clubs with better pay (the first challenge to the "reserve clause" and a foreshadowing of free agency).Starting with the 1946 Mexican League season, players who "jumped" from their organized baseball clubs for more lucrative contracts in Mexico were blacklisted for having violated the reserve clause.[6][a] Faced with a lawsuit seeking to overturn the 1922 ruling, then-Commissioner of Baseball Happy Chandler offered amnesty to the jumpers in 1949, thus keeping organized baseball's antitrust exemption intact.