When just before Christmas last year Crystal Palace turned to the former England manager - the only to boast a 100 per cent record from his spell in charge, albeit cut short after just 67 days - the club looked set to only be heading in one direction.
Hovering over the relegation zone, the Eagles had lost their drive under Alan Pardew, the man who not so long ago had taken them to the FA Cup final and left fans, as well as the owners, dreaming of bigger and better things.
Roll the clock on some five months and this is a Palace squad which has regained self-belief, finally buying into the 62-year-old's mindset which saw a remarkable upturn in fortunes including a shock victory over leaders Chelsea at Stamford Bridge, humbling Arsenal and then winning at Anfield.
Allardyce has a track record of getting the job done, including somehow rescuing Sunderland from what had looked certain relegation last season.
A man who calls a spade a spade has prospered almost everywhere he has been since launching his managerial career in Ireland with Limerick back in 1991.
His spells at Blackpool, Notts County, Bolton, Blackburn, West Ham and Sunderland all brought varying degrees of success.
Only at Newcastle, where he was appointed by Freddy Shepherd in April 2007 and then discarded by new owner Mike Ashley within eight months, did his stock fall, with the Toon Army less than impressed by both the football on offer and the results it brought, a theme which was reprised during his time at Upton Park.
For now, though, one thing is certain. If you need results, not to mention the millions of revenue which goes along with Premier League status, you know who to call.