15 managers on that list and only three of them went on to manage at a higher level, and two of those - Ince and Sheridan - didn't do so for long. 8 of them have not managed in the Football League since.
Cotterill is the only ex-manager who can really claim to have moved onto better things. Martin Allen has had some success but always at least a division below where he left us.
Let's hope we can avoid adding to the list this season and that Nolan can soon find a solution to the current problems.