Plan B free agency was a type of free agency that became active in the National Football League in February 1989 to 1992. Plan B free agency permitted all teams in the NFL to preserve limited rights of no more than 37 total players a season; if a player was a protected Plan B free agent, he was incapable of signing with another team without providing his old team the first opportunity to sign him again. The rest of the players were left unprotected, liberated to negotiate contracts with the rest of the teams in the league.