Was Drazen Petrovic?
At the end of the day Yao did his part. He was a multiple time all star and All NBA team member. He brought the Rockets back to the playoffs for the first time since Barkley, Hakeem, and Pippen were there and kept them with winning seasons. He played for his country very well if you look at his stats before coming over. He was a great ambassador to the league and introduced China to the brand and attracted fans like only the true greats have. Lastly he will be a hall of famer automatically because it is the Basketball Hall of Fame and they honor your achievements for your ball career as a whole.
Yao wasn't a bust, if you want to see one look up the name: Oden, Greg.
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As for the talk of the lanky player making it and lasting at a high level, the only one who could take that claim is Big Z who fought like hell to return to the league and took a chance on a foot surgery that they told him could 50/50 end his career; he is the Grant Hill of big men so to speak