MLS player contracts are unique in professional soccer because they are technically signed between the player and the league itself, not individual clubs. This reflects MLS's single-entity structure, where the league centrally manages player contracts and roster rules.
Contracts typically range from one to five years in length, with guaranteed compensation that includes base salary and any guaranteed bonuses. Option years, which give the club the choice to extend the contract, are common. Performance bonuses, signing bonuses, and image rights arrangements can also be included. The contract must comply with the salary cap, unless the player occupies a Designated Player slot. Players who are out of contract and meet service time requirements can become free agents, while others enter the MLS re-entry process.