Tony Pulis has been sacked as West Brom head coach with the club a point above the Premier League relegation zone and without a win in 10 top-flight games.
The Baggies were beaten 4-0 at home by Chelsea on Saturday.
Albion won their first three games of the season, but have drawn four and lost seven since beating Accrington in the Carabao Cup on 22 August.
Former West Brom manager Gary Megson, who had been Pulis’ assistant, is taking over “until further notice”.
Chairman John Williams added: “These decisions are never taken lightly but always in the interests of the club.
“We are in a results business and over the back end of last season and this season to date, ours have been very disappointing.
“We would like to place on record our appreciation of Tony’s contribution and hard work during a period of transition for the club which included a change of ownership. We wish him well in his future endeavours.”
West Brom face Tottenham in the Premier League at Wembley on Saturday and follow that with home games against Newcastle (28 November) and Crystal Palace (2 December).
- Writing was on the wall – ‘I would be amazed if he stays in a job’
- I’m a victim of my own success – Pulis
- 606: West Brom were ‘terrible, spineless and pathetic’
Three good seasons undermined by four bad months
Pulis, 59, who has also managed Stoke City and Crystal Palace in the Premier League, was named Baggies boss in January 2015.
They were 17th in the table when he took charge but finished that campaign in 13th, falling a place the following season before ending the next in 10th.
However, they have struggled since March, taking just 12 points from their past 21 fixtures, winning one home league game in eight months and scoring only nine goals in 12 Premier League matches this season.
He is the fifth manager to be sacked by an English top-flight club since August.
|Pulis’ contrasting fortunes at West Brom|
|Premier League games only|
|January 2015 to May 2017||94||29||27||38||96||121||30.9%|
|August 2017 to present||12||2||4||6||9||18||16.7%|
‘A victim of his own football philosophy’ – analysis
BBC Sport’s Simon Stone
Tony Pulis tends to dismiss statistics – good and bad – when they are raised by the media. So the fact he came into his news conference on Friday armed with them underlined the gravity of his situation. He reeled them off – the top-10 finishes, the top Midlands club – and repeated them in his programme notes on Saturday. The inference was clear – he has delivered.
The Welshman is a victim of his own football philosophy. He is a results man. The pretty stuff is not his style; Pulis does functional. Supporters don’t find it easy on the eye and even his players tire of it. It means when results go wrong, there is no bank of goodwill to buy him time.
Supporters have had enough and, even worse, owner Guochuan Lai was on a rare visit to see the latest sorry debacle. Lai is a rich investor, who presumably enjoys the fact he owns an English top-flight team. Saturday’s defeat was humiliating for him, for West Brom and for Pulis.
Having stated his case so forcefully and been met by such an overwhelmingly negative response, Pulis would surely have headed home to Bournemouth on Saturday knowing there was only one outcome.