Hugh Duffy of the 1894 Boston Beaneaters.
The record for the highest single season batting average is held by Hugh Duffy, who batted .440 in 1894.
Ty Cobb's highest season average was .424 in 1911.
Roger Hornsby highest batting average in a season was .424 in 1924.
because the world series
Derek Jeter's highest batting average was .349, it was the 1999 season.
.390 in 1980
As of the 7th game in the 2011-2012 season the phillies are in 1st in batting average batting .337
.393 in 1923
As far as the major leagues go, Derek Jeter's highest batting average was .349, it was the 1999 season.
John Olerud holds the record for highest batting average by a New York Met in a single season with .354 in 1998