Brilliantly successful players rarely make the best bosses or don't even try. Charlton, Law, Best. Moore, Pele, Maradona. It's those men who left the game feeling they had a lot to prove and who subsequently had so much invested in making it work that they labour till they bleed and innovate along the way who change the footballing paradigm. Clough, Wenger, Mourinho, etc all either had careers cut short or made such a markedly insignificant impression on the game that they felt management was their single footballing opportunity to stamp their visions on the world. Even Fergie felt he was stuck serving in pubs having not quite done what he could have done in the game. Defenders may be a little more cautious and therefore unlikely to be the biggest risk-takers, hence a lower rate of outstanding success in management. But it really just comes down to the life and the character.
