A proposition bet, or "prop," is any wager on an event within a game that is not tied directly to the final score or spread. Props turn a single game into dozens of individual betting markets, which is both their appeal and their risk. Because there are so many of them, sportsbooks cannot price every prop as tightly as a main-market spread, and that creates opportunity for bettors who do their homework.
Player Props
Player props are the most popular category. They are bets on an individual's statistical performance, usually framed as an over/under on a number the book sets.
- Football: passing yards, rushing yards, receptions, receiving yards, touchdowns scored, longest completion.
- Basketball: points, rebounds, assists, three-pointers made, steals, plus combined "PRA" (points + rebounds + assists) lines.
- Baseball: strikeouts by a pitcher, hits, total bases, home runs, runs plus RBIs.
- Hockey: shots on goal, goals, assists, points, goalie saves.
A typical player prop looks like Jalen Brunson over 24.5 points (-115). You are betting purely on whether he clears that number, regardless of who wins. The price around the line, often near -110 to -120 on each side, contains the vig.
Where player-prop value hides
Player props reward specialized knowledge: matchups, usage rates, injuries to teammates, pace, and weather. If a team's top receiver is out, the number-two option's targets and yardage lines may not adjust as fully as they should. Because books post so many player lines, they lean on models and cannot manually sharpen each one, which is exactly why disciplined prop bettors can beat them.
Game Props
Game props concern team-level or whole-game outcomes that are not the standard side or total.
- Team totals: the over/under on a single team's points.
- First to score / first-half result: which side scores first, or who leads at halftime.
- Method or timing of scoring: whether the first score is a touchdown or field goal, or whether there is a score in the game's opening minutes.
- Race-to props: which team reaches a set point total first, common in basketball.
- Both teams to score / margin buckets: in soccer and other sports.
Novelty and Exotic Props
Around marquee events like the Super Bowl, books post novelty props: the coin-toss result, the length of the national anthem, the color of the Gatorade shower. These are pure entertainment with heavy margins baked in. Enjoy them as such, but do not expect to beat them; they exist because they are fun, not because they are beatable.
Over/under versus yes/no props
Most props take one of two shapes. The first is an over/under on a continuous number, such as a receiver's yardage or a pitcher's strikeouts, priced with juice on each side. The second is a yes/no or discrete outcome, such as "anytime touchdown scorer" or "first basket," priced as a straight moneyline. The two demand different thinking. Over/unders reward you for projecting a distribution and finding a soft number, while yes/no props reward you for estimating a specific probability and comparing it to the implied odds. Knowing which type you are betting keeps you from misjudging the risk.
How Props Are Priced
Props use the same odds and implied-probability math as any other bet. A prop at -120 implies 120 / (120 + 100) = 54.5% break-even. The two sides of an over/under usually add up well past 100%, and the overround on props is often higher than on main markets, sometimes 6% to 8% or more, because they are harder to bet in large volume and books protect themselves. That is the tradeoff: softer lines, but a wider spread. Our odds explained guide covers this math in detail.
Practical Tips for Betting Props
- Shop lines aggressively. Player-prop numbers vary more between books than spreads do. Half a point on a yardage line is significant.
- Confirm the status. Check injury reports, projected minutes, and lineups right up to kickoff or tip.
- Understand alternate lines. Books offer the same prop at different numbers for different prices; the alternates can offer better value than the main line.
- Beware same-game parlay props. Bundling correlated props into an SGP is popular, but the book reprices them; see our parlay guide.
Props for New York Bettors
All nine of New York's licensed mobile sportsbooks carry deep prop menus, and the offshore books we review, including BetOnline and SportsBetting.ag, accept New York players and often post props earlier in the week. Earlier lines can mean softer numbers, but offshore operators are unregulated, so weigh that against the protection of a state-licensed book. Whichever route you take, props are best enjoyed with knowledge and a plan, not as a shot in the dark.
Finally, treat props with the same bankroll discipline as any other market. Because a single game can offer dozens of prop options, it is easy to spread small bets across ten different players and call it research when it is really just volume. Pick the handful of props where you have a genuine, defensible read, stake them consistently, and skip the rest. A focused three-prop card built on real edges will beat a scattered fifteen-prop card every time.