What a prop actually is
A player prop is a bet on one individual's statistic rather than on a team result: points, yards, shots, strikeouts, rounds survived. It is the most direct way to express a view about a single player — and the market where availability and grading rules matter most.
Why props are priced the way they are
A prop price reflects expected usage as much as expected ability. Minutes, touches, at-bats, innings and rounds are the raw material. A talented player on limited minutes is a different proposition from a lesser player who is on the field for the whole game, and the price usually reflects the usage rather than the reputation.
This is why team news moves props harder than it moves moneylines. A single lineup change can reprice every player market on the board within minutes.
The three rules you must read first
Participation. What happens if the player does not appear at all? Most books void the prop, but the definition of "appear" matters — a single minute may or may not count.
Thresholds. Is the line a whole number or a half? A whole number introduces a push and a stake refund; a half number removes the push and forces a win or a loss.
Statistics source. Which provider grades the bet, and what happens if that provider corrects a figure after the event? Some books settle on the official figure at the final whistle; others wait for corrections.
Correlation is not a free lunch
Combining props from the same game feels clever — a quarterback's passing yards with his receiver's receptions — but the legs are correlated, which means they tend to succeed or fail together. Some books restrict these combinations; others price them with a reduced multiplier. Either way, the apparent value of a correlated parlay is usually smaller than the headline price suggests.
Managing a prop-heavy session
Props encourage volume: many small tickets, each feeling modest. Volume is exactly where a budget erodes unnoticed. Set a per-prop stake cap and a maximum number of props per event, and treat the cap as fixed regardless of how confident a single line feels.