Definition
Stacking means pairing outcomes that rise together. In betting or DFS, this often means using a quarterback with one of his receivers, or pairing a team total over with a player touchdown prop from that same offense.
The key math is correlation: if two events are independent, P(A and B) = P(A) × P(B). A stack looks for spots where P(B | A) is higher than P(B).
Worked Example
A bettor likes Chiefs over 27.5 team points at −110 and Travis Kelce anytime touchdown at +140. A $100 bet at −110 wins $90.91. A $100 bet at +140 wins $140.
Those bets are connected: if Kansas City scores 31 points, Kelce’s touchdown chance is higher than it would be in a low-scoring game. The stack does not change the listed payout, but it changes how the bettor evaluates the chance of both bets winning.
Why It Matters
Stacking helps a bettor build tickets around one clear game script instead of mixing picks that work against each other. It is most useful when player props, team totals, and DFS lineups all depend on the same scoring environment.