Athletic sport, usually played on an indoor court in which two
competing teams of five players each attempt to score by throwing an inflated
ball so that it descends through one of two baskets suspended, at each end of
the court, above their heads. The team scoring the most such throws,
through field goals or foul shots, wins the game. Because of its
continuous action and frequent scoring, basketball is one of the most popular
spectator as well as participant sports in the world.

Competitive game of skill played with a hard ball and bat between
two teams of nine players each. Baseball is often called the national
pastime of the United States, because of its strong tradition and great
popularity. It is played throughout the world by people of all ages.
Major League Baseball
(MLB)

These are a relatively new form of sports in the United States that are becoming more and more popular. Each year they have their own 'Olympic' style games known as the X Games. Some of the better known extreme sports are bike stunt, inline skating, motor cross, skateboarding, and snowboarding. EXPN
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