Proposition bet

For an example detailed in the book The Professor, the Banker, and the Suicide King, David Grey once bet Howard Lederer, a professional poker player who became vegetarian following gastric bypass surgery, $10,000 for Lederer to eat an offered cheeseburger.

Spot-fixing is an illegal activity where a person involved in the game takes steps to ensure a certain result for a proposition bet.

Examples include Matt Le Tissier attempting to fix the time of a throw-in by kicking it out immediately after the game started,[2] or Ryan Tandy attempting to fix the first point scored method in a rugby league game, failing after the opposition decided against kicking a penalty goal and instead scored a try.

The fact that these minor events often contribute a minor or non-existent impact on the score or result of a game makes recruiting players for spot fixing an easier attraction than attempting to fix an entire match that may consist of dozens of players.

Due to past scandals, NCAA president Charlie Baker called for a ban on prop bets in college sports in early 2024.