What is a stack in fantasy football?
A stack is a group of correlated players from the same real-life team or game, most often a quarterback paired with one or more of his pass catchers, used to boost upside when that offense has a big game.
Correlation
Correlation in fantasy football is when two players' scoring moves together, such as a quarterback and his wide receiver producing points at the same time.
Correlation describes how closely two players' fantasy scores are linked. Teammates are often correlated because they share the same game script. A quarterback and his top wide receiver are the classic example: when the quarterback throws for 300 yards and three touchdowns, his receiver probably caught a big chunk of that production. A running back and defense on the same team can also be correlated, since a team that builds a lead runs the ball more and lets its defense play with an advantage.
Correlation matters most in daily fantasy sports and best ball, where you build rosters without making lineup decisions each week. Stacking correlated players, like a quarterback with two of his receivers, raises the chance that a big game for one means a big game for the whole stack. In season-long leagues, correlation matters less for weekly lineups but can be useful when choosing between two similar players. Starting a receiver who faces your opponent's quarterback can work as a hedge, because a bad day for that passer likely means a good day for the receiver covering him.
Correlation also works in reverse. Players on opposing teams often have negative correlation, like a running back facing a tough run defense, or two running backs in the same backfield splitting carries. Understanding these links helps you avoid accidentally doubling up on the same risk, and it helps you pair players whose good outcomes tend to happen together.
Common questions
Is correlation more important in DFS or season-long leagues?
It matters most in daily fantasy and best ball, where roster construction is the main decision. In season-long leagues it is a smaller factor, but it can guide weekly lineup calls and hedging.
Can correlation hurt your fantasy team?
Yes. Rostering players who depend on the same outcome, like two running backs in one backfield, means one player's success often comes at the other's expense.
Related terms
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