When you buy out a player's contract, you pay them all or part of the rest of their salary in a lump sum and then release them. In real baseball, each player's contract buyout clause is individually negotiated as part of their contract. Some players must be paid the full salary in their contract, others only a token amount. To simulate this in Baseball Mogul, you must pay the player 50% of the salary remaining on their contract when you choose to release them.