The DeJuan Blair Factor

I'm continually blown away by the fact that DeJuan Blair slipped into the second round of the NBA draft. This particularly egregious because it's not like he was a seventeen year-old playing in an obscure foreign league. He had two college seasons under his belt, and based on his play there his success in the NBA was very predictable. But he slipped because he stands at the intersection of two frequent errors in NBA drafting.

One is an irrational aversion to "undersized" big men. NBA teams correctly note that college success does not directly correlate with NBA success, so beyond raw numbers they look for physical tools that are likely to lead to success. This is reasonable as far as it goes, but different things project better or worse and rebounding in the NBA actually correlates pretty highly with rebounding in college. It's also true that size helps with rebounding, but the point is that if an undersized player has success at rebounding in college, he's likely to continue doing so in the pros.

The other issue is injury aversion. Kevin Pelton covered this issue in an article I linked to yesterday, but the problem here is that GMs seem to vastly overrate the value of your average draft pick. There are 30 players picked in the first round of the NBA draft and 30 more picked in the second round. There's only 30 teams, and in practice most teams play an 8 or 9 man rotation even though rosters are bigger than that. That means that even in the first round there's a very high ratio of draft picks to rotation spots. And of course some rotation players are actually pretty bad. On top of that, lots of times you draft a good player (LeBron James, Shaquille O'Neal, etc.) and then they leave in free agency. The upshot is that if you get a good year or two or three out of someone before their career is ruined by injury then you're coming out ahead.

Now of course it matters if you're talking about the number one overall pick or something. But teams drafting in the second half of the first round have absolutely no business worrying about injuries. What you should be worried about is whether or not the guy you get will be any good at all.