The Major League Baseball Players Association (MLBPA) is for big leaguers only. The organization is the collective bargaining representative for Major League Baseball's 1,200 players. The union negotiates salaries, arbitrates grievances, ensures the on-field safety of its players, controls the license for MLB and distributes licensing revenues. The MLBPA also certifies player agents. All players, coaches, managers, and trainers who have signed with the league are eligible to pay dues of $50 per day during the 183-day season for membership in the association. MLBPA was organized in 1966 and negotiated the first collective bargaining agreement with team owners in 1968.