Teams managed
1991–1992 Limerick (player-manager)
1992 Preston North End (caretaker manager)
1994–1996 Blackpool
1997–1999 Notts County
1999–2007 Bolton Wanderers
2007–2008 Newcastle United
2008–2010 Blackburn Rovers
2011–2015 West Ham United
2015–2016 Sunderland
2016 England
2016–2017 Crystal Palace
Bolton - his massive overspending on backroom staff started a big downturn in their finances.
Newcastle - went down, needed a total rebuild. Couldn't get rid of crap like Nolan for ages as he'd given them big deals.
Blackburn - Couple with Venkys he's helped take that club into ruin
West Ham - saddled with utter rubbish like Carroll that they can't shift. Owners and fans hated him because they knew he was up to no good.
Sunderland - short termism contributed to a bloated, crap squad that, hey, now is marooned near the bottom of the Championship.
Palace - only team worse than us.
Could all be a huge coincidence
Yep, he could 'save' us short term (we're ten games in ffs). But the lasting damage won't be seen til he leaves.