NFL Collective Bargaining Agreement
Anti-Collusion
Section 2(d)Other Club Conduct
No Club may have a policy not to negotiate with, or enter into a Player Contract with, any player who is free to negotiate and sign a Player Contract with any Club, on any of the following grounds, if such policy is inconsistent with Section 1 above:
(d)
that the player is or has been subject to any Right of First Refusal.