In most Fantasy Leagues, the playoffs start in week 13 or 14 of the regular season. The Fantasy Bowl generally ends up being in Week 16 of the regular season to avoid the dreaded Week 17 when playoff teams start resing their starters for the playoff run. If your league uses Yahoo! or Sportsline or NFL.com to track stats, there should be a link to the rules of how the playoffs work for your particular league.