The West Ham United manager was sacked by the Toon after just eight months in charge in 2008.
Newcastle have already been relegated once since he was removed by Mike Ashley. Allardyce has since earned a reputation of being a manager chairmen dare not sack after his other former clubs Bolton Wanderers and Blackburn Rovers went from Premier League mainstays to middling Championship sides following his departure.
After being appointed at Blackburn in 2009-10, Big Sam led the team to a 10th-placed finish and a League Cup semi-final.
Then, just a few months into the next season, Indian company Venkys bought the club and, like Ashley before them, sacked Allardyce. The next season they were relegated after a run of 11 years in the top flight.
Bolton, where he had built something of a dynasty, even guiding the club into Europe, were also relegated alongside Rovers, enhancing Alladyce's reputation further still.
And in a twist of fate, Newcastle could now pay the ultimate price by being sent down for a second time since he left, by the man himself.
With 35 points and three games to go, Newcastle could still be reeled into the relegation zone and currently have the second worst goal difference in the league.
"Other teams are winning," he said.
"That is putting an awful lot of pressure on Newcastle. They are on the way down and the others are on the way up.
"Their players have a lack of confidence and the players below have a lot of confidence at this stage because they are winning probably more matches than they have all season."
After recording only their third win in 2015, the Hammers may have renewed confidence when they travel north on May 24th.
There is some hope for Newcastle fans should they go into that game still fighting for their Premier League lives, though.
Historically Newcastle have had the better of meetings between the two teams with 50 wins to West Ham's 39, there have been 37 draws.