Abstract: The baseball and softball tournament system allows for completion of a large, multi-team baseball tournament in three days or less. This is accomplished by combining two elements: First, a computerized system replaces human fielders, as well as largely replacing human umpires for determining most offensive and defensive outcomes. The computerized system calls all balls/strikes, and determines base hits and outs, while also determining the probability of runs scored. Second, to encourage gameplay speed, variations of tournament rules, such as utilizing batting tees, soft toss, coach pitch, machine pitch, and team designated pitchers promote game speed, increases player and game action and reduces downtime during the contests. Also, other tournament rules such as shortening game length by determining innings played for regulation games from two innings to no more than eight innings, and other such rules help reduce the amount of time to complete the competition games.