Found this while going through some NFL stuff.......

As the NFL readjusts to the problems that arise from spending that once again will be approaching the annual salary cap, there’s an important provision of the new Collective Bargaining Agreement that needs to be highlighted.

Under Article 13, Section 6(b)(v) of the CBA, each team may carry over any remaining cap room from one year to the next by submitting written notice, signed by the owner of the team, to the league office no later than 14 days before the start of the next league year. The written notice must indicate the maximum amount of cap room that the team wishes to shift from one cap year to the next.

Interesting that I had not heard of this before, had anyone else?