Players who are unrestricted free agents do not have a team. They were either released by their club, had their contract term end without a renewal, or were not selected in a league's amateur selection of players. Unrestricted free agents can sign with any team but aren't guaranteed a contract. An undrafted free agent contract is exactly that: It's a contract for an undrafted free agent player. These contracts are usually worth about $7,000 to $8,000 per season and last for one year. The team can choose to keep the player or let him go. If they keep him, then the contract is extended through the 2013 season; if not, then the player is free to sign with another team. Here are some famous cases of players who went unselected in the NFL draft before signing with teams as undrafted free agents: Eric Berry (Kansas City Chiefs), Adrian Clayborn (New York Giants), Michael Bennett (Seattle Seahawks), Malcolm Butler (Patriots).