NFL prop glossary

NFL player prop glossary

Understand the terms used on the SharpSlap board and throughout NFL player-prop analysis, from lines and projections to calibration and frozen picks.

A concise reference for the terms used across SharpSlap and NFL player-prop markets. Definitions describe how the terms are used in this product; sportsbook rules can vary by operator.

Player prop

A market tied to a specific player's statistical outcome, such as rushing yards, receptions, pass attempts or fantasy points.

Line

The numerical threshold attached to a prop. A rushing-yards line of 64.5 creates two directions: above 64.5 or below 64.5.

Over / More

A prediction that the player's realized statistic will finish above the posted line.

Under / Less

A prediction that the player's realized statistic will finish below the posted line.

Projection

An estimate of the player's expected statistical outcome. A projection is not the same thing as a probability of beating a line.

Model confidence

On SharpSlap, a historically calibrated measure attached to a qualified prediction. Higher confidence corresponds to stronger historical performance among comparable model signals.

Calibration

The process of mapping model output to observed historical accuracy so a displayed confidence scale has a consistent empirical interpretation.

Qualification threshold

A model-specific rule a prediction must clear before it is published on the SharpSlap board.

Frozen pick

A published prediction preserved before kickoff so later line movement or refreshes do not rewrite the row used for grading.

Hit rate

The share of graded predictions that finished on the predicted side of the line over a defined sample.

Push

A result that lands exactly on a whole-number line under rules where neither side wins. Treatment depends on the platform or grading rules.

Defense rank

On the SharpSlap board, contextual opponent ranking for the exact prop type. The interface explains the direction of the rank so users do not have to infer it.

Player history

Recent player results compared with historical lines, used as context rather than as a substitute for the model prediction.

Model history

Historical performance context for a model or comparable predictions, useful for interpreting the displayed signal.

Slate

The set of games and available player props being evaluated for a given NFL game window or week.

Slip builder

A SharpSlap interface feature for organizing candidate legs. It does not place or transmit a wager.

How these terms fit together

A typical SharpSlap row starts with a player prop and a specific line. A model evaluates whether the result is more likely to finish on the over/more or under/less side. Only predictions that clear the appropriate qualification threshold are shown, and the displayed confidence is informed by historical calibration. The row is then frozen before kickoff so the later hit rate is tied to what was actually published.

For examples of the underlying workflow, see how SharpSlap works and why frozen picks matter.

See the live workflow

Turn the framework into a board you can inspect

Create a free account to see this week's qualifying NFL player props, then use the public methodology and results pages to understand how SharpSlap produces and grades them.