California Code, Labor Code - LAB § 514.5

(a) Sections 510, 511, and 512 do not apply to a person who is covered by a contract to play baseball at the minor league level with a labor organization that has at least 10 years of experience representing baseball players and who is compensated pursuant to the terms of a valid collective bargaining agreement that expressly provides for the wages, hours of work, working conditions of employees, payment for time worked during the off-season and spring training, and final and binding arbitration of disputes.