Ball Park Baseball was developed by Professor Charles Sidman from the University of Kansas in the early 1960s. Each team from 1894 up to the present (2006 season) is available and includes every pitcher with 29.3 IP or hitter/position player with a significant contribution to the team's performance. The game is played according to the rules of baseball. The action of the game is based upon random numbers between 1 and 50. Numbers 1 through 25 determine the strength of the batter; numbers 26 through 50 provide the capability of the pitcher. Batters have ratings for arm (catchers/outfielders), fielding (by position) and running (catchers have and additional rating for handling pitchers). Pitchers have ratings for fielding and holding runners on base. The game also has very detailed (and essential to game play) unique ball park charts (capturing the dimensions and effect of each field) for several historic baseball stadiums. Each card and ball park chart is based on actual statistic performances of the players.