In other words, if a match begins with two or more players, the number of balls utilized will be "120" multiplied by the total number of players. If you still haven't found the winner after 9 innings, you'll have to play some extra innings, which will necessitate additional balls. A game that goes into the 13th inning requires "150" balls. In the National League, each team has an equal chance of winning or losing a game in which they engage in full compliance with their assignments. It is therefore necessary to include both teams in any calculation concerning the likelihood of victory or loss. In the American League, however, where one team usually has a substantial advantage over the others, this is not generally true. While it is possible for the AL champion to be determined by means of a tie-breaker system designed to even out these differences (for example, if the season ended today, the Chicago White Sox would win because they have a better record than the Minnesota Twins), in general this is not done. Since the average size of a ballpark is about 50,000 seats, and there are about 6.5 million people living in the United States, then we can estimate that there are about 250 balls in use at any given time in Major League Baseball games. This means that if a game lasts nine innings, there will be 3.5 million possible ways that it can end.