Joseph Cheong was born in South Korea. Currently, he lives in America. He is professionally a poker player despite the fact that he is a college graduate with a degree in the field of psychology and economics. He started playing poker during his college years. During this period, he used to play at local level and that too with his friends only. After completion of his college, he began to participant in live poker tournaments. He cashed in the first time at the Deep Stack Event. He was a winner at the main event of World Series of Poker. He finished at the final tables of the 2010 WSOP main event. For five times, he finished at the first place at the World Poker Tournaments. By the year 2014, his total earnings from poker games exceeded $7,744,078.

In 2014, he finished at second place at the Draw Low Ball event along with a total of $55,309 in cash prizes. Again in the same year he secured 40th position at the WSOP Hold Them Up event and earned a cash prize of $3421. In WSOP, Shootout Hold Them event of 2014 he finished at the 67th place and won a cash prize of $4,411. On 23rd May 2014, he won WSOP high roller event as well as earned a cash prize of $295,500. In February 2014, he finished at 2nd place of $25k High Roller Event and won a cash prize of $94,806. 2014 was the best year for his career.

In January 2014, he won the online poker tournaments on the Poker Star. He is fond of all types of poker tournaments. In 2013, he finished at 17th place in Deep Stack event. He was ranked at 23rd place by the Global Poker Index. Despite his successes in poker tournaments, he has not been able to win a title or a bracelet at the main event.