My experience is that if a guy tests fast but acts slow then when they get to AFL level they dont have the ability to read the play. While it can be taught he will never be elite at it and as such it then makes rodda's ability to kick pointless as he will always be at a major disadvantage over his opponent. Quality key defenders have to be good at one of two things. They either have to be better at reading the play than their opposition or better body to body and athletically than their opposition. The first group are the brian lakes, matthew scarletts and dustin fletchers of the competition. The second group is the darren glass' of the competition. If a key defender doesn't fit into either group they will at the very best end up being a role player and much more likely fail to make the grade. Brown has ability because he has or at least used to have better agility than most key forwards, Mackenzie reads the play well defensively, is stronger and athletically is roughly as good as most gorillas. Schofield has huge potential because he can read the play, is offensive and is better athletically than all bar franklin. I don't see the same ability in Rodda.