What Is Exposure in DFS

Exposure is the share of your lineups a single player appears in. If you build 100 lineups and a player is in 40 of them, your exposure to that player is 40 percent. It only becomes a useful idea once you are building more than one lineup, which is why it comes up in bulk building.

Why it matters

When you enter a contest many times, you are not making one bet, you are spreading across a set. Exposure is how you describe that spread. A player you are confident in might be in most of your lineups, giving you high exposure to his night, good or bad. A player you are unsure of might be in only a few. The set as a whole is shaped by these shares.

High exposure to one player ties your results tightly to that player. If he has a big game, most of your lineups benefit. If he does not, most of them suffer. Low exposure does the opposite: it spreads your result across more players, so no single one decides your night.

Caps and floors

Two controls keep exposure where you want it.

• A cap sets the most of your lineups a player can be in. Cap a player at 30 percent and he will not land in more than 30 of 100 lineups, even if he looks good in every one.
• A floor sets the least. Floor a player at 20 percent and he will be in at least 20 of 100, even if he would not otherwise make the cut.

Together they let you say, in plain terms, how much of your set rides on each player, instead of leaving it to chance across a hundred separate builds.

Exposure and stacking

Exposure pairs naturally with stacking. A stack decides which players ride together; exposure decides how often they ride at all. Setting both is how a large set of lineups ends up looking the way you intend rather than random.

By hand versus at scale

Tracking exposure across a hundred lineups by hand is nearly impossible; you would be counting appearances in a spreadsheet. A builder that handles exposure does the counting for you, so a cap or a floor you set holds across the whole batch.

A worked example

Say you build 50 lineups and cap a player at 40 percent. He will appear in no more than 20 of them, so at most 20 of your lineups ride on his night. Floor another player at 10 percent and he shows up in at least 5. Set those for a handful of players and the rest fills in around them, so the whole set of 50 comes out balanced the way you asked, instead of a player sneaking into 45 lineups because he looked good in every build.

One lineup or many

Exposure only means something across a set. In a single lineup a player is either in it or not, which is 100 percent or 0. The idea earns its keep the moment you enter a contest more than once, which is exactly when keeping track of it by hand stops being realistic.