The NFL players' union confirms it has filed a collusion claim against the league's owners. The case has been filed with the same special master who is considering the union's complaint about the league's TV contracts. In December, the league and the players' union agreed to extend the deadline to file a collusion claim. Union spokesman George Atallah says Tuesday he can't comment on details of the collusion claim. Read more: http://sports.espn.go.com/nfl/news/story?id=6033492
