On this day in 1941 “Teddy Ballgame” Williams became the last player to hit .400 in a season.
He did this during a double-header against the Philadelphia Athletics on the last day of the regular season. When he reached .400 he could have sat out so as not to have risked his accomplishment, but he continued to play and wound up with .406. He went 6-8 on the day.
Williams was a Marine and served in both WII and Korea, missing 5 seasons. He still had a career 521 homeruns and 2654 hits with a lifetime average of .344 (still the 7th highest).