The championship series in Major League Baseball is known as the World Series. This annual event determines the champion of MLB by pitting the winners of the American League and National League against each other. The World Series has a rich history, dating back to 1903, and showcases the best talent in professional baseball, culminating in a best-of-seven playoff format. Winning the World Series is one of the highest achievements for teams and players, solidifying their legacy in baseball history.