Throwing a no-hitter is rare and considered an extraordinary accomplishment for a pitcher or pitching staff.
In 2000, Major League Baseball reversed its decision, ruling that the statistics which were recognized in each year's official records should stand, even in cases where they were later proven incorrect.
However, the variance between methods results in differing recognition for the 1887 National League batting champion.
Cap Anson would be recognized, with his .421 average, if walks are included, but Sam Thompson would be the champion at .372 if they are not.
A safe course for the official scorer to follow is to score a hit when exceptionally good fielding of a ball fails to result in a putout.