Hull have announced the departure of head coach Marco Silva.
The 39-year-old opted to leave his position following a meeting with the club's owners on Wednesday night.
Silva signed a short-term deal in January but failed to stave off the club's immediate return to the Sky Bet Championship, a year after their win over Sheffield Wednesday in the Play-Off Final at Wembley sealed a place in the top flight.
Hull said in a statement: "The Club can announce that Marco Silva has opted to leave his position as Head Coach. Confirmation had been delayed due to finalising the terms of his release.
"Marco was offered the opportunity to continue the work he has done in the four-and-a-half months he has been at the KCOM Stadium. Unfortunately, after considering his future, he has chosen to leave in order to further his career and departs along with Assistant Head Coach Joao Pedro Sousa, First Team Coach Goncalo Pedro and Goalkeeping Coach Hugo Oliveira.
"Although disappointed by Marco's departure, we would once again like to place on record our appreciation of his efforts and those of his support staff. Despite only being in charge for a short period of time, the 39-yearold became a firm fans' favourite and will be forever remembered for his efforts to maintain our Premier League status.
"The Club will now undertake a thorough and considered recruitment process to appoint a replacement."
The club are now seeking their fourth boss in less than 12 months and here are some potential candidates.
There would be a degree of sentiment involved in the appointment of McClaren, a former Tigers midfielder who made more than 150 appearances during six years with the club. Most candidates would struggle to match McClaren's CV, which includes the England, Middlesbrough and Newcastle jobs, while he is well-versed in life in the Championship too. After things ended sourly during his second stint at Derby in March, he may feel he has a point to prove.
The former Norwich boss is looking to get back into work, having been sacked in March after the Canaries' expected promotion challenge never really materialised. However, the 35-year-old has previously demonstrated he is capable of getting a team out of the Championship after doing so with Norwich two years ago. The Hull job would see him move much closer to his native Scotland.
Pardew ticks many boxes as an out-of-work veteran boss and also has a previous Championship promotion on his CV. His last seven years in management were spent in the top flight with either Newcastle or Crystal Palace so there may be a reluctance on his part to drop down a level. Location may also be an issue - the Newcastle job is Pardew's only one away from the south.
Former Sheffield Wednesday skipper Pearson has been out of work since October last year, when his brief spell in charge at Derby ended controversially - just as his time at Leicester did in 2015. He built his reputation with the Foxes and has been credited with laying the foundations for their amazing Premier League success - and he has already admitted his interest in any vacancy at Middlesbrough, where he is a former captain.
The former Manchester United star has made no secret of his desire to manage in his own right, having had a taste of it during a four-game spell at Old Trafford following David Moyes' departure towards the end of the 2013/14 season. His name has been linked with a series of clubs in recent weeks. He may lack experience, but he would bring a ''wow'' factor to the club.