In 1968, the Major League Baseball Players Association negotiated the first-ever Collective Bargaining Agreement (CBA) in professional sports. It has evolved and strengthened over the years with each generation of players, sometimes at great personal sacrifice, ensuring the continuity of rights for the next.
The current CBA expires on Dec. 1, 2016.
The Joint Drug Agreement went into effect in December 2011 and is scheduled to terminate Dec. 1, 2016 (the same date as the Basic Agreement). The "prohibited substances" section of the Joint Drug Agreement is updated annually.