The fantasy football season is divided into Game Weeks, with each Game Week beginning on Tuesday at 12:01 a.m. PT and ending the following Monday at 11:59 p.m. PT.

The deadline to complete all transactions (trades, waiver claims, and free agent claims) for a given week is 11:59 p.m. PT every Sunday.

However, you can only add players to your active roster for the current week if the transaction is completed no later than five minutes before the start of the player's game. In other words, none of the active players on your team (players in a starting roster spot) involved in a move can have played or be within five minutes of their game's start time, or the transaction is not allowed. So, for example, transactions for all active players who play at 10:00 a.m. PT must be completed by 9:55 a.m. PT.

You are allowed to make transactions involving your bench players at any time during a week—even if a player's game has begun. However, you are not permitted to activate any player who is already within the five-minute limit. All such players have to remain on your bench until the following week.

Additionally, all intra-roster moves (switching players between active and bench spots) can be made until five minutes before the start of each player's game.

However, after you've used a player at a particular position, you cannot edit your lineup at that position for the remainder of the week. So, you cannot use a QB who plays at 10:00 a.m. PT on Sunday, and then edit your lineup to use another QB who plays later on Sunday or Monday night.

Also, keep in mind that your league might include a trading deadline. Click the "Settings" link from your league home page to view the configuration of your league. Trade deadlines do not impact the ability to add players via waivers or free agency.