NFL free agency is upon us in earnest here in the 2013 offseason. The "legal tampering" period is over, and it is time to separate rumor from fact.
There have already been some big moves—roster cuts signing elsewhere or teams trading big names—but the meat of the market starts today. Rarely does a team win free agency...But there are certainly some moves that work out better than others, and some that history favors.
What are the 50 greatest moves in free agent history?