This could be the money week in your Fantasy Football League.
Week 14 of the NFL season often represents the end of the regular season because Week 15 is the start of the playoffs and Week 16 is often used for the championship game.
This is the way it has been done for years, because NFL teams often use the get-away game in Week 17 to play untested backups and remove veterans early in the game.
Since nobody wants their fantasy championship decided by the whim of head coaches, Week 17 often does not count in Fantasy Football.