I guess when people ask what is the biggest transition to the NBA from college, it is definitely defense and the mental part.
Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the drug store, but that's just peanuts to space.
So, after school, I needed to learn a trade and started to work as a tailor.