#4 Manuel Pellegrini - West Ham United
Although West Ham didn't set the world alight with their start to the season, the Hammers did reasonably well and found themselves in the top half of the Premier League standings after their stunning 2-0 victory against Manchester United in October. Since then, Manuel Pellegrini's side have failed to win a game in the Premier League and their woes have been compounded in recent weeks, as the club's injury list continues to grow with every passing week.
West Ham bolstered their ranks with the big-money additions of Pablo Fornals and Sebastien Haller this summer but have failed to kick on from where they left off last season, casting doubts over Pellegrini's position at the club. The Hammers' squad on paper is arguably one of the best outside the top-six but his side have failed to replicate that on the pitch, as they find themselves just 3 points clear of the relegation zone in 16th place.
Pellegrini is a Premier League-winning manager with Manchester City but West Ham could part ways with him reluctantly if results don't improve in the coming weeks, as it would represent too big a risk for the club to persist with a manager if on-field performances don't pay dividends to their investment off it.