Biography:Known for his enormous strength and stamina, he fought out of a crouch with his left arm extended forward, allowing him to absorb tremendous punishment while wearing his opponents down.
A natural left-hander, he possessed one-punch knockout power in his left hook.
1899-06-09 American boxer James J. Jeffries KOs defending champion Bob Fitzsimmons of England in 11th round in Brooklyn, New York to win the lineal World Heavyweight title
1899-11-03 World heavyweight boxing champion James J. Jeffries retains title; beats Irishman Tom Sharkey on points in 25 rounds at Coney Island Athletic Club, Brooklyn, NYC
1900-04-06 James J. Jeffries KOs Jack Finnegan in 1 for heavyweight boxing title
1900-05-11 James J. Jeffries KOs James J Corbett in 23 for heavyweight boxing title
1901-11-15 James J. Jeffries TKOs Gus Ruhlin in 6 for heavyweight boxing title in San Francisco
1902-07-25 3 years after winning the title from English boxer Bob Fitzsimmons, American champion James J. Jeffries repeats the dose with an 8th round KO in San Francisco for the heavyweight crown
1903-08-14 Champion James J. Jeffries scores a 10th round TKO win over former champion James J Corbett in San Francisco; his 6th heavyweight boxing title defence
1904-08-25 Champion James J. Jeffries scores a 2nd round TKO win over Jack Munroe in San Francisco; Jeffries retires after his 7th heavyweight boxing title defence
1905-05-13 World heavyweight boxing champion James J. Jeffries retires undefeated after 7 title defences; returns in 1910 to be beaten by Jack Johnson
1910-07-04 "Fight of the Century": Jack Johnson beats James J. Jeffries by TKO in 15 in Reno, Nevada to retain his world heavyweight boxing title
Ken Norton
Leon Spinks
Muhammad Ali
Sugar Ray Robinson
Vitali Klitschko
Wladimir Klitschko