The Norweigan manager won three trophies during his two years at the club
Manuel Pellegrini was not the only manager saying goodbye in British football today.
Celtic manager Ronny Deila was also managing his last game at a club he had been in charge of since June 2014.
His Scottish Premier League champions hammered Motherwell 7-0 in a display that the Norweign said "couldn't be better."
The 40-year-old replaced Neil Lennon as the manager of the Hoops and won back-to-back Scottish Premier League titles and a Scottish Cup last year.
He said, "It's an emotional day, a fantastic day in every way. We played very, very well with a very young team and scored seven goals.
"There is so much talent here and these guys can be great in the future."
That talent might have been best highlighted by Jack Aitchison who, at 16 years and 71 days, became the youngest player to ever represent Celtic and the youngest to score too. He landed Celtic's seventh and final goal with his first touch after coming on as a late subsitute for Tom Rogic.
Deila told reporters after the game that the last two years were special for him and said he is proud that "I’ve been myself, done what I believe in and everyone has seen that I’ve given everything."
Celtic manager Ronny Deila addressing the media at Paradise for the last time. (MD) pic.twitter.com/PzCecxodTu— Celtic Football Club (@celticfc) May 15, 2016