Nigel Pearson has been appointed as the new Southampton manager in the wake of Saturday's FA Cup defeat at Bristol Rovers.
The 44-year-old is a very experienced coach who has come through the Football Association coaching ranks working with every age group up to the Under 21's and recently stepped down as Newcastle assistant manager following the arrival of Kevin Keegan.
Saints chairman Leon Crouch has acted swiftly and decisively to bring in a new man following a run of four defeats in five games.
Crouch told the club's official web site: "We are very grateful to John and Jason for all their hard work and their passion after taking over in very difficult circumstances.
"They did everything they could and they must feel as hurt as everyone else at the club by Saturday's result.
"It was clear that the uncertainty of the management situation was having a detrimental effect on the players and so we have decided to bring in a new man.
"Pearson is a top quality coach with plenty of experience and good contacts in the game. He is also a disciplinarian with a strong work ethic and I believe he will inject new impetus into our campaign.
"He was a top defender in his time and has a good coaching and managerial pedigree at Stoke, West Brom, Newcastle and with the England Under 21 squad.
"I believe he is the right man to steady the ship and get us moving up the table once more. He is a winner and he will instil that mentality in the players."