Tyrus Raymond "Ty" Cobb (December 18, 1886 – July 17, 1961), nicknamed "The Georgia Peach," is regarded by historians and journalists as one of the greatest baseball players of all time.
Cobb played from 1905 to 1928. He retired with a number of offensive records for Major League Baseball, including the all-time highest career batting average at .366, a record which stands to this day, and the highest total number of hits, 4191, a record which stood until 1985, when it was broken by Pete Rose. In 1936 he became the charter member of the Baseball Hall of Fame.
There is extremely abundant evidence from personal acquaintances of all sort that Cobb was a certifiable psychopath.