Sun did not start playing basketball until he was 15, when he was 6'7",[3] but he came to the United States in early 2005 to train for a possible NBA career. Sun was declared eligible in the 2005 NBA Draft, and had a brief tryout with the Lakers,[4] but was not selected.
It was later determined through medical exams that the cause of his lack of endurance is a benign brain tumor attached to his pituitary gland that is stifling gonadotrophin releasing hormone production. It is also stimulating over-production of growth hormone, a condition known as acromegaly, and can lead to premature death if not removed. Surgery was scheduled for August 31, 2005, but since Sun had neither health insurance nor enough money to pay for the more than 100,000 dollars in medical bills, it was re-scheduled and Sun's agent, Charles Bonsignore, started a fund raiser to raise the necessary funds.
After the surgery, Sun was signed by USBL team Dodge City Legend in Dodge City, Kansas on March 30, 2006. [1]
On January 31, 2007, he signed with the Maryland Nighthawks of the American Basketball Association.[5]. Owner Tom Doyle said "having Ming here sells tickets". On March 11, Sun was a part of the tallest lineup in the world, a Guinness World Record, with four players over 7-foot. [6]
On March 13, 2007 it was announced that Sun Ming Ming signed with the Grand Rapids Flight, a team in the International Basketball League. [7]