Apparently, that's how it used to work and all players were notified. It's on NFL.com. I agree that they should know but he did nothing wrong in terms of the rules when his contract was negotiated.
Under the old law he would have had to apply for free agency by 2nd March but the NFL are saying that the NFLPA did not inform agents of the rule change and so they were all gearing up for the 2nd March deadline.
I know it all seems a bit weird but I can't believe that all of the agents would've missed it.
How much coin would TOs agent be missing out on? Theres no way he would just LET that happen.