Tony Pulis has been sacked as West Brom head coach and Gary Megson takes over for their next game.
The 59-year-old has left his position as head coach at the Hawthorns after just two wins in his last 21 Premier League games following Saturday's 4-0 defeat to Chelsea.
Albion are just a point and a place above the relegation zone after an 11-game winless run in all competitions.
Northern Ireland manager Michael O'Neill has been installed as Sky Bet's 2/1 joint favourite for the post alongside Aberdeen boss Derek McInnes. Sam Allardyce (5/1) and Alan Pardew (8/1) are next in the betting.
Chairman John Williams told the club's official site: "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."