Sunderland fired Simon Grayson one third of the way through his first season.  

Grayson has improved every club he has managed at.  He has achieved promotion with all of them (Blackpool, Leeds, Huddersfield and Preston) and never been relegated.  He has gone into Sunderland which looks like a club that is rotten to the core, and has been given 15 league games to turn their fortunes around.  Fair enough they are third from bottom, but given all that is wrong there they weren't going to go straight back up and given time to work and a transfer window to fix a few things I am certain he would have got them to a comfortable position from where he could build for next season.

I think the transfer window situation means that if anything managers need more time than used to be the case to turn a club around.  Ironically it seems to have had the opposite effect.

Has Grayson gone from a good manager with a great record over 12 years to a numpty within three months?  Of course he hasn't.  He is just the latest victim of short term thinking and board room panic.