Major League Baseball proposed limiting most free agent contracts to five years and 15% of a team's salary cap and to eliminate deferred compensation, fleshing out details of a salary cap plan likely to spark a confrontation with the players' association.

During a bargaining session Thursday at the union's office, MLB said it would accept the union's proposal granting free agency a year early for players who have reached age 30 if the union accepted the league's salary cap system.

MLB also proposed boosting the minimum salary from $780,000 to $1 million for those with two years of big league service.