What is a dynasty league in fantasy football?
A dynasty league is a format where you keep your entire roster from year to year and add only rookies and free agents through an annual rookie draft.
In a dynasty league you own your players indefinitely and only the rookies enter via a yearly rookie draft, turning the game into a multi-year team-building project.
Because you keep everyone, a 23-year-old breakout receiver is worth far more in dynasty than a 31-year-old running back with the same current production — future value matters. Trading involves not just players but future rookie picks, and rebuilding versus contending becomes a season-long strategic decision.
Dynasty rewards long-term thinking and youth. Player values are driven by age, situation, and draft capital as much as last week's box score, which is why dynasty rankings differ sharply from redraft.