While both the Dallas Cowboys and Washington Redskins appear ready to accept the salary cap penalties handed down to them after their appeals failed, the NFLPA isn't quite done with this story yet.

On Wednesday, the players union filed a collusion claim with the NFL about the penalties:

Just filed to SI.com: NFLPA has filed a collusion claim against the NFL for trying to suppress earnings in uncapped year.

— Jim Trotter (@SI_JimTrotter) May 23, 2012

The union feels that the Cowboys and Redskins are being punished by the other owners for increasing salaries, while the owners have argued that the two teams were violating the spirit of the CBA by attempting to gain a competitive advantage with their salary cap machinations.

The crux of the dispute may come down to whether last year's CBA released the league from liability from any pending claims, as the NFLPA is saying that the settlement reached with Dallas and Washington unearthed new information about the league's attempt to institute an informal salary cap in 2010.

For all the latest on the Cowboys offseason, stay tuned to the SB Nation Dallas storystream as well as Blogging The Boys.