Scoring
Tiebreaker
Payouts
Waivers/Free Agency
Trades
Lineups

Trades Rules

TRADES
Players may be traded between teams from the conclusion of the draft up until kickoff of the 9th week of the NFL season and there is no limit to the number of trades a team can make during that period. Trades must include the same number of players, and must stay within the restrictions of the 22-man roster. For example, a team trading a running back must receive a running back from the team they are trading with in order to keep 6 running backs on both rosters.
 
Note that the trading deadline is only for player trades between teams. Owners are free to add and drop players via free agency and waivers as usual throughout the entire season and the playoffs.
 
Beginning with the 2001 season, the league has imposed a restriction on trades that involve money. Known as The Ed "Stein"-Brenner Rule, this rule states that no team may purchase another team's player and no team may make a trade offering cash money as compensation. The only exception to this rule is that teams may negotiate who is responsible for paying any applicable transaction fees.