Just accidentally came across this. Under the radar without much fanfare, the NFL has changed PUP rules. Compare to the old, where all players who started the regular season on the PUP list were required to remain on it for the first six weeks. And once those six weeks were up, a player had a three-week window in which he needed to begin practicing. From the day he returns to practice, the team had an additional three-week window by which to activate him. If a player was not activated at that point, they would have to remain on the PUP list for the remainder of the season.