The batting championship is awarded to the Major League Baseball player in each of the American League and the National League who has the highest batting average in a particular season.
Currently, a player needs to accrue an average of at least 3.1 plate appearances for each game his team plays in order to qualify for the batting title. An exception to this qualification rule is that, if a player falls short of 3.1 plate appearances per game -- but would still have the highest batting average if enough hitless at-bats were added to reach the 3.1 average mark, the player still wins the batting championship.
The latest example of this exception being employed was in 1996, when Tony Gwynn had a .353 batting average, but only 498 plate appearances -- 4 short of the 502 necessary. Inasmuch as 4 additional hitless at-bats would have lowered his batting average to .349, but .349 was still better than anyone else in the league, Gwynn was named the National League batting champion. [1]
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He dont even have to hit .400 to win.
I think .355 would win it for him.