Answer: A spitball is an illegal baseball pitch in which the ball has been altered by the application of saliva, or some other foreign substance. This technique alters the wind resistance and weight on one side of the ball, causing it to move in an atypical manner. In August 1920, Ray Chapman was killed when he was struck in the temple by a spitball thrown by pitcher Carl Mays. Following the 1920 season, the spitball was banned, except for existing spitballers who were grandfathered in and allowed to keep throwing the pitch until they retired. Seventeen existing spitballers were granted this exemption. Burleigh Grimes lasted the longest, retiring in 1934.
A spitball (aka spitter, wet one, or unsanitary pitch) is a pitch in which the pitcher applies saliva to the baseball, either to change its aerodynamic properties or to reduce friction between his fingers and the ball.Baseball is a bat-and-ball game played between two teams of nine players each, who take turns batting and fielding. The batting team attempts to score runs by hitting a ball that is thrown by the pitcher with a bat swung by the batter, then running counter-clockwise around a series of four bases: first, second, third, and home plate. A run is scored when a player advances around the bases and returns to home plate.