The following is information taken from the MLB wesbite regarding the Major League Baseball Joint Drug Prevention and Treatment Program. See full MLB drug policy here.
Major League Baseball’s Joint Drug Prevention and Treatment Program (the “Program”) was established by agreement of the Office of the Commissioner of Baseball and the Major League Baseball Players Association (the “Commissioner’s Office,” the “Players Association” and, jointly, the “Parties”) to: (i) educate Players on the risks associated with the use of Prohibited Substances (defined in Section 2 below); (ii) deter and end the use of Prohibited Substances by Players; and (iii) provide for, in keeping with the overall purposes of the Program, an orderly, systematic, and cooperative resolution of any disputes that may arise concerning the existence, interpretation, or application of this Program. Except as otherwise provided herein, any dispute arising under the Program shall be subject to resolution through the Grievance Procedure of the Basic Agreement.
The Program covers: (i) all Players on the Major League Clubs’ 40-man rosters; (ii) any Player who becomes a free agent under Article XIX or Article XX of the Basic Agreement; and (iii) any Player who is released from a Major League roster unless the Player voluntarily retires or signs a Minor League contract or a contract with a club in an unaffiliated professional baseball league (“Players”).