Breadon was noted for a very conservative nature with his finances, highly demanding nature of his teams' success on the field, and bold moves otherwise. When he became minority owner, the Cardinals were $150,000 in debt. In 1925, he moved Branch Rickey from the dugout to the front office and promoted second baseman Rogers Hornsby to player-manager. Breadon also convinced cross-town American League rival St. Louis Browns owner Phil Ball to allow the Cardinals to move into Sportsman's Park. This allowed him to sell the dilapidated Robison Field property for a total of $275,000 to the city and a trolley company, clear their debts, and, with Rickey's oversight, establish an official, contractually-linked minor league farm system. This strategy developed into the current minor league system and the Cardinals used it to circumvent the practice of bidding against the more affluent Major League teams such as the New York Yankees and New York Giants for players from minor league teams, which at that time were unaffiliated. Although Minor League Baseball has existed as long as baseball has been organized, it was the first player development system of its kind in any professional sport.