22. Michael Olowokandi: 1998, Pick #1
The Los Angeles Clippers used the #1 overall pick in the 1998 NBA Draft on center Michael Olowokandi, who was coming off a senior at the University of the Pacific in which he averaged 22 points, 11 rebounds, and 3 blocks per game his senior year, and was the 1997–98 Big West Conference Player of the Year.
But in 500 regular season NBA games, Olowokandi averaged 8.3 points, 6.8 rebounds, and 1.39 blocked shots per game. His selection looks even more egregious when you consider that Dirk Nowitzki, Paul Pierce, Vince Carter, Antawn Jamison, Rashard Lewis, and Mike Bibby were all taken in the same draft (after him).