The League President shall appoint an official statistician. The statistician shall maintain an accumulative record of all the batting, fielding, running and pitching records specified in Rule 9.02 for every player who appears in a league championship game or postseason game.

The statistician shall prepare a tabulated report at the end of the season, including all individual and team records for every championship game, and shall submit this report to the League President. This report shall identify each player by his first name and surname and shall indicate as to each batter whether he bats right-handed, left-handed or both ways, and as to each fielder and pitcher, whether he throws right-handed or left-handed.

When a player listed in the starting lineup is substituted for before he plays on defense, he shall not receive credit in the defensive statistics (fielding) unless he actually plays that position during the game.  All such players, however, shall be credited with one game played (in batting statistics) so long as they are announced into the game or listed on the official lineup card.

Rule 9.20 Comment:

The Official Scorer shall credit a player with having played on defense if such player is on the field for at least one pitch or play. If a game is called (for example, because of rain) after a substitute player enters the field but before a pitch is thrown or a play is made, the Official Scorer shall credit such player with a game played in the batting statistics but shall not credit such player in any defensive statistics. If a game is called (for example, because of rain) after a relief pitcher enters the field but before a pitch is thrown or a play is made, the Official Scorer shall credit such pitcher with a game played in the batting statistics but shall not credit such pitcher in any defensive statistics or with a game pitched.

Any games played to break a divisional tie shall be included in the statistics for that championship season.