Jack was born on June 24, 1895 in Colorado. Jack was raised in a poor family who struggled for money.jack worked as a farm hand as he was growing up
When jack was 15 he started welding metal for exstra cash.by the time Jack was 17 he was a young skilled fighter.Jack realized he could make more money fighting than from welding medal.
When Jack left home at 17 he needed to make some money, he found an easy way to do this.he would go to local bars and challenge the "tough guys" to a fight, if they accepted bets would be placed on the fighters.Jack won all the fights and won lots of money
Jack quickly earned the nicknames Kid Blackie and The Manassa Mauler and was challenged by other pro fighters and that is hoe he became famous.
Jack soon became the world heavyweight boxing champion from 1919-26.Jack defended his tittle a whopping 5 times. He won the title by fighting jess Willard and winning by knockout