It is one of the most famous numbers in sports. Ted Williams had a .406 batting average for the Boston Red Sox in 1941, which was the last time a batter reached the .400 mark for a full season. But technically it was not the last time Williams hit .400. It was not even the highest batting average of his career.
It may not have qualified for any awards, but Williams batted .407 in 1953. The catch is that he returned from military service in Korea on Aug. 6, so he had only 110 plate appearances for the season.