NFL Collective Bargaining Agreement
NFL Player Contract
Section 9(e)(i)Forfeiture of Salary
Players and Clubs may not agree upon contract provisions that authorize the Club to obtain a forfeiture of any Salary from a player except to the extent and in the circumstances provided in this Section 9. For the avoidance of doubt, Paragraph 5 Salary already earned may never be forfeited, and other Salary already earned may never be forfeited except as expressly provided herein. The maximum permitted forfeitures described below do not in any way obligate any player or Club to agree to any forfeiture.
Player Contracts may not contain individually negotiated provisions for forfeiture relating to violations of the Policy on Performance-Enhancing Substances (formerly known as the Policy on Anabolic Steroids and Related Substances) or the NFL Policy and Program on Substances of Abuse, or for failing any drug test. A player suspended by the League pursuant to either of those policies for a period encompassing regular season or postseason games shall be required to forfeit any Forfeitable Salary Allocations on a proportionate weekly basis.