re: Ryan Griffin signed to active roster

The teams have to notify the league when they are planning on signing a practice squad player from another team. The league then sends a memo to the player's current team giving them a chance to protect him. This rule allows for teams to not tamper with players who are signed to practice squads and try to sign players to gain a competitive edge if they are playing each other in the near future. The league views the teams that win the FA battle after the draft the sole owner of the player's rights until they decline to sing him to the active roster once interest from other teams becomes clear.