21. Greg Oden
Career Years: 2007-Present
Career Lowlight: Has third microfracture surgery and is released by the Blazers in 2012.
The Oden vs. Kevin Durant debate was the dominant narrative leading up to the 2007 NBA Draft, with many (including the Trail Blazers, who were picking first overall) deciding that Oden's gifts as a center more than compensated for his dubious injury history. Those people were wrong. Oden was an unmitigated disaster in Portland, missing his entire rookie year and playing in just 82 games over the course of his first five seasons, and he is now sitting out the entire 2012-13 season in order to rehab his third microfracture surgery. At least we know he can do one thing well like send a cell phone picture message.