Because he didn't get started til late. He didn't play high school basketball in his freshman year, then he went to Inglewood High where he just dunked and blocked shots (he averaged 5 block a game) - he didn't get coached really to learn much of anything else. He went to Fresno St during a chaotic time when there were NCAA violations, players killing people, players getting suspended for drugs (not him), etc. So he was just lucky enough to get through.
I first saw him in 2004 at Spurs summer league, but he's 10 x a better player than that now. For the past few years, he's been the last cut in camp on a few teams. Last season, he actually requested to get waived by Seattle because he had an offer for $500K+ to play with Maccabi. He needed the money because he has a baby and Seattle wasn't guaranteeing him anything. This summer, he played for the Bucks in summer league and looked great and had interest from 7 or 8 NBA teams. He was then sent to a camp by the Cavs in August, then they brought him up to Cleveland about a month before training camp started -- so he's been there for around 50 days. I'm just not sure they have room for him if they make a trade, or if they end up signing AVarejao back. We'll see. In the NBA, when he makes it, he will find a niche as a shotblocker. In limited minutes with the Cavs in preason, he's averaging a block in five minutes playing time. (Sorry for the rant)