The show was based solely on college basketball careers and domination of players while in college. Jordan and Duncan were great college basketball players, but I feel like King was better than both at the college level. I felt that Jordan and Duncan may have made this list based on their NBA accomplishments.
King was a force when he played. He dominated and is considered top four or five ever to play in the SEC (behind Pistol Pete, Barkley and Shaq). King was an All america all three years at UT and the SEC player of year three times. King average a double-double for his career (25 pts and 13 boards) and scored over 1900 pts and grabbed over 1000 rebounds in only 76 games. For his career, he averaged 8 points more than Jordan and 9 points more than Duncan. To top this off, at 6'7", he average more rebounds and shot a high FG % than 7 footer Duncan. Duncan was a dominate big man, but never took his team beyond the Elite 8. Prior to his arrival, WF went to the sweet 16 and was already a great team. Jordan was great player, and did win a NC at UNC and had that defining moment against Georgetown. So I can see the argument for him.
Overall, I feel that King is in the top 20 greatest college players ever and in the top 100 greatest NBA players ever. Hopefully he will be in the NBA HOF soon.