player who caught the fly ball becomes the next batter. In another version only one base is used, as in the 19th Century game of One Old Cat. The base is third base. The fielding positions are center field, left field, shortstop, third base, and pitcher. Two batters work together until one makes an out and is replaced. The batter on deck acts as the catcher. If no one is covering home (both batters are running), then the runner advancing homeward can be put out by throwing the ball to the plate before the runner gets there - a practice called "crossing out". In still another variation, a volleyball or similar ball may be used and there will be no pitcher. The "up" player sets the ball in motion by holding it in his or her non-dominant hand, and sets it in motion by a hefty strike from the other hand. This often occurs in crowded play areas, such as schoolyards, where the use of bats and baseballs is usually banned for reasons of safety. President Warren G. Harding played scrub baseball as a boy , as did the historian Bruce Catton, and rockabilly singer Sonny Burgess . External links http://minnesota.publicradio.org/collections/special/columns/baseball/archive/2005/05/scrub.shtml http://everything2.com/index.pl?node_id=1509452 http://baseballanalysts.com/archives/2005/04/ball_games.php Baseball genres Children's games Youth culture in the United States