Roby's comments bother me, but I'm not sure if they really should or not. I wasn't a great athlete even at the high school level, so I knew I had to outwork everyone to get playing time, so that's what I did. The idea of not being fully engaged during practice makes no sense to me.
But if I were as good as Roby, maybe I would have thought it was ok to slack off sometimes too. I don't know though. No matter how good you are, there's always someone better to chase.