article: The message from Celtic Park, in the wake of the announcement of Ronny Deila's exit at the end of the season, was one of calm and an insistence that they know what's gone wrong and they know what needs to happen in order to fix it. As chief executive, Peter Lawwell has been caught in the fallout of Sunday's loss to Rangers in the Scottish Cup semi-final. There have been calls for his head as well as Deila's, but Lawwell is probably less likely to leave now than he has been at any point in recent times. Lawwell - and all people in his position - think about legacy. They all want to leave on a high, serenaded out on the back of a big feel-good moment. Lawwell is not likely to have Deila as the full-stop on his years at Parkhead, even though Deila was his appointment. That's where the pressure comes, though. His next decision is a monumental one - and he'd better get it right. If he doesn't then you wouldn't bank on him leaving on his own terms. If he does, and a winning manager is the result, then everything else fades away - all the supporter disaffection, all the issues about stockpiling players, all of it. There were huge doubts swirling around Celtic Park in the dog-days of Tony Mowbray's reign but Neil Lennon took over and took things forward. Rangers could scarcely have been at a lower ebb than a 6-1 aggregate loss to a poor Motherwell side at the end of last season but Mark Warburton, in rapid time, turned it around. Good managers are like that. They have a touch of magic about them - they make other problems disappear. The names of possible successors are coming thick and fast - David Moyes is, by the looks of it, fluttering his eyelashes at Aston Villa and Celtic. Lennon has made it clear that he would be happy to talk about a return. Malky Mackay has already let it be known that he would love the job. Alan Stubbs was considered a contender in the media a few months ago, then was written off when Hibs hit the wall, and might yet be a contender again if Hibs win the Scottish Cup and get promotion to the Premiership. Media playback is not supported on this device Northern Ireland manager Michael O'Neill has been mentioned. Roy Keane was offered the job before Deila and he's on the betting short-list again now. Before this is done, there will be other names - many, many others. Keane's recollection of the summer of 2014 is interesting. It comes from his book, The Second Half. "I got a call: would I go and have a chat with Dermot Desmond," Keane wrote about the time he was approached to succeed Lennon. "At the end of the chat, [Desmond] said: "The job is yours.' It was all pretty straightforward. There'd be one or two restrictions, about staff. They'd already picked the man who'd be my assistant, and they were insisting on him.
summary: Football history is littered with examples of seemingly lost causes rescued by a great redeemer, situations that appear hopeless being turned around by somebody who knows exactly what they're doing.