Professional baseball players contracts often come with large signing bonuses. Signing bonuses are paid to players when they sign a baseball contract, and are in addition to a regular yearly salary. Performance bonuses are also common in baseball players contracts. Performance bonuses allow players to make more money for a job well done. If they reach certain goals or achieve certain milestones, they may be eligible for automatic bonuses on top of their regular salary. Information regarding penalties may also be included in baseball players contracts. Sports agents are hired by baseball;; players to negotiate the terms of contracts. Often, baseball players contracts contain special clauses that allow for perks such as hotel rooms and plane tickets, and are often agreed to by teams in order to secure desired players. Good sports agents are able to negotiate contracts full of special addendums, and the more a team wants a player the more the team will be willing to give that player in order to secure his spot on the team.