A double-double in basketball occurs when a player achieves double-digit figures in two of the five main statistical categories during a game. Recording a double-double is an impressive feat, and the very best players do it on a daily basis.
The five statistical categories that can be included in a double-double are listed below:
Note: A player that manages to post 10 or more of two out of the five categories listed above during the course of a game has achieved a double-double.
There are several different types of double-doubles, and some occur more often than others. It is more common for a player to achieve 10+ points, rebounds, or assists than it is for a player to compile double-digit blocks or steals. For example, a relatively normal double-double would look something like 10 points and 10 rebounds, while a 10 point and 10 steal game is considered a rarity.
Extremely talented players have a tendency to achieve a double-double on a game-to-game basis. This is known as 'averaging' a double-double. It is reflected in the player's season-wide statistics, with a player posting 10 points and 10 rebounds during most or all of the regular season having a seasonal average of 10 points and 10 rebounds per game.