Does anyone know of a website that lists NFL team rosters with their contract information (for example, Winfield is under contract through the 2009 season, or to say it another way, Winfield has one year remaining on his contract)?  I am finding this information difficult to find in one spot.  Any assistance would be most appreciated!

So far I have checked NFL.com, ESPN, pro-football-reference.com, cnn-si, and sportingnews.  I also checked vikings.com just for the vikings roster.  None of them had the information I was looking for.