Statistics play an important role in summarizing baseball performance and evaluating players in the sport.
Since the flow of a baseball game has natural breaks to it, the sport lends itself to easy record-keeping and statistics. Statistics have been kept for professional baseball since the creation of the American League and National League, now part of Major League Baseball.
Many statistics are also available from outside of Major League Baseball, from leagues such as the National Association of Professional Base Ball Players and the Negro Leagues.
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