Salary Cap Might Be Moving Up Again. NFLPA found and arbitrator agreed that withheld gate receipts should have been in the calculation for salary cap purposes, but were not.

http://deadspin.com/report-arbitrato...lio-1760717473

http://profootballtalk.nbcsports.com...o-salary-pool/

As explained by Futterman, the controversy arose from a term in the labor deal that allows teams to exclude certain sums from the vat of money that determines the salary cap. Burbank found that the league created another category of funds that isn’t contemplated by the CBA. Since the money didn’t fit into any of the recognized categories, the money should have been included in the pool that determines the salary cap [but wasn't].
The NFLPA understandably characterizes the issue as catching the league trying to pull a fast one. The league understandably says it was an accident. The bottom line is that millions will now flow from the league to the players, driving up the salary cap by at least $1.5 million for each of the league’s 32 teams.