While cleaning out some old emails early Tuesday morning, I came across one from the league that I received back in 2013 that I had missed. It was an important one at that.
In that missed email were changes to the 2011 CBA that were voted on and passed prior to the start of the 2013 season and one of them affected the rules regarding the physically unable to perform (PUP) lists.
Here is the 2013 CBA league rule change on PUP returns:
Commencing on the day after the conclusion of the sixth regular season weekend (October 15) and continuing through the day after the conclusion of the 11th regular season weekend (November 19), clubs are permitted to begin practicing players on Reserve/Physically Unable to Perform for a period not to exceed 21 calendar days.