In the NFL, trades are as rare as wins for the Detroit Lions. The salary cap has been the biggest obstacle for trades because it forces teams to keep their roster's salary at a fixed budget. With no CBA extension, 2010 will become an uncapped year.
The 2010 NFL Draft is considered by many scouts to be one of the deepest classes in recent history. With the uncapped year looming, look for teams to acquire draft picks for their leaving players instead of letting them walk in free agency without compensation.