The 2-1 loss to the Foxes left West Ham 17th within the division, only one level and one place above the relegation zone.
It was the Hammers’ fourth defeat of their final 5 Premier League video games and the board determined that that they had to act.
A membership assertion learn: ‘West Ham United can affirm that Manuel Pellegrini has left the Club with instant impact.
‘Joint-Chairmen David Sullivan and David Gold, together with the Board and everybody at West Ham United, would really like to place on report their thanks to Manuel for his service over the previous 18 months.
‘Mr Sullivan said: “It is with great disappointment that we’ve had to make this choice. Manuel is a gentleman and it has been an actual pleasure to work with somebody of his calibre.
‘“However, it has become clear that that a change is required to get the Club back on track in line with our ambitions this season. We felt it was necessary to act now in order to give the new manager as much time as possible to try and achieve that goal.”’
Pellegrini arrived at West Ham in May 2018 and loved a stable first season answerable for the membership, ending 10th within the Premier League, amassing 52 factors.
However, the Hammers haven’t made progress this marketing campaign, profitable simply 5 of their 19 matches and in real hazard of relegation heading into 2020.
Leicester made 9 adjustments to their staff for the journey to the London Stadium, with the likes of Jamie Vardy, Ben Chilwell, James Maddison, Youri Tielemans and Caglar Soyuncu all not noted of the beginning Xi.
However, Brendan Rodgers’ aspect nonetheless managed to come away with three factors thanks to objectives from Kelechi Iheanacho and Demarai Gray.
David Moyes is the early favorite with bookmakers to take over from Pellegrini, with the likes of Rafael Benitez and Eddie Howe additionally thought of candidates.
West Ham host Bournemouth within the Premier League on New Year’s Day earlier than touring to Gillingham within the FA Cup on 5 January.