1. Jack was born in Sweden to a Swedish mother and Gambian father. គាត់​មាន

six siblings — two older sisters, two younger sisters and two younger brothers.

2. He started boxing on his own curiosity and has already gotten some of his

younger siblings interested in training. Professional boxing was banned in Sweden from 1969 តាម​រយៈ​ការ 2007

3. Began boxing in 2000 and took quickly to the sport before starting his

international amateur career.

4. Qualified for the 2008 Olympics for Gambia. He remains the only boxer to

ever represent the country in the Olympics and was the flag-bearer and one of three athletes to represent Gambia at the Beijing games.

5. Jack is the first Swedish-born man to hold a boxing world title since

Armand Krajnc held a middleweight title in 2001. The only other Swedish-born world champion was Ingemar Johansson, who famously won the heavyweight world title by knocking Floyd Patterson down seven times in one round on his way to a stoppage in 1959.

6. Came to the U.S. to pursue boxing after the Olympics and first began

ការ​បណ្តុះបណ្តាល នៅ​ឯ​ទីលាន​លំហាត់​ប្រាណ Gleason បាន​នៅ Brooklyn.

7. Was discovered by former heavyweight world champion Shannon Briggs

និង he temporarily moved to Miami to work with Briggs. He maintains a close relationship with Briggs today.

8. After moving to Las Vegas, Jack met Floyd Mayweather in 2012 ខណៈ​ពេល​ដែល

sparring Andre Dirrell and eventually signed with Mayweather Promotions.

9. After winning his world title in 2015, he was a finalist for the Swedish

Athlete of the Year.

10. He traveled to Gambia earlier this year and last year, along with Ishe Smith,

to deliver training equipment and other donations to the country.