Four managers that have underperformed in the Premier League this season 

#2 Manuel Pellegrini (West Ham United)

Manuel Pellegrini has gone from hero to zero.

Manuel Pellegrini arrived in London in 2018 with a big reputation on his hands. Having won the Premier League with Manchester City in the past, he has all the know-how required to lead a club like West Ham to the glory they deserve.

The Hammers had shown they have what it takes to be in the top half of the Premier League, even challenging for a Europa League spot, at the start of the season. Those would have been the goals that the fans had in mind this season or at the very least, an improvement on last season when they finished tenth.

Currently, West Ham sit in 17th position, just three points above the drop-off zone. Given the money invested in summer, with the acquisitions of Sebastien Haller and Pablo Fornals, they should really be doing better. Manuel Pellegrini will know this and he'll know he's capable of better, perhaps him and West Ham United are simply a mismatch.