What Is a Stack in DFS

A stack is a lineup that includes more than one player from the same team. Instead of picking players spread across every game, you deliberately group two or more from one side. That is the whole definition. The reasons people do it follow from one simple fact.

The idea behind it

Teammates' good days often happen together. When an offense has a big game, several of its players tend to score well at once: a quarterback who throws for a lot of yards usually did it by throwing to a receiver who caught a lot of them. Putting both in one lineup means that when the team goes off, your lineup rides the whole thing rather than a slice of it.

The flip side is that the reverse is also true. If that team has a quiet night, a stacked lineup feels it more than a spread-out one. A stack concentrates both the upside and the downside on one team's result.

Where you hear about it

Stacking comes up most in higher-scoring sports and formats. In baseball, grouping several hitters from one team is common, because a team that scores a lot of runs usually did it with several bats in the same inning. The specifics of which players and how many are a strategy question, and this guide is about the term, not a recommendation.

Stacking across many lineups

If you build one lineup, stacking is just who you pick. If you build many, it becomes a setting: you decide whether to keep certain players together across the set rather than letting every lineup be independent. A builder that supports stacking lets you turn that on, so the pairings you want ride along through the whole batch.

Stacking and exposure go together

Because a stack repeats players across lineups, it interacts with how much of your set each player appears in, which is called exposure. Reading the two together helps: a stack decides who rides with whom, exposure decides how often.

Stacks look different by sport

The shape of a stack follows how a sport scores. In football, a common stack pairs a quarterback with one of his own pass-catchers, because a big passing game is also a big receiving game for whoever caught the ball. In baseball, stacks tend to be several hitters from a team's batting order, because runs come in bunches when a lineup turns over in an inning. The idea is the same, teammates scoring together, but the players it points to depend on the sport.

A term you may hear: the bring-back

You might see the word bring-back next to stacking. It means adding a player from the opposing team to a stack, on the thinking that a high-scoring game lifts both sides. Whether to do it is a strategy question this guide does not take a side on; it is here only so the term is not a mystery when you meet it. However you stack, it is a choice about which players share a lineup, nothing more. The rest, how often they appear and how much of your set rides on them, is exposure.