The upheaval did not begin this summer. The 2025-26 Premier League season featured 11 managerial changes, with Forest among the clubs to make multiple appointments during the campaign.
The average tenure of a top-flight boss now stands at about 20 months, illustrating just how fleeting life in one of football’s most demanding jobs can now be.
Recent history also suggests changing manager offers no guarantees. During the 2025-26 season, several clubs that switched coaches continued to struggle. Forest employed three managers during the campaign, Tottenham changed head coach twice, while Chelsea also altered direction before the season ended.
Others, however, did enjoy an immediate uplift. Carrick averaged 2.6 points per game across his first five matches as United boss, while Rosenior collected the same return after taking charge of Chelsea. Rosenior’s tenure ultimately proved short-lived, though, with the Blues winning just one of his final eight Premier League matches before he was dismissed.
Research discussed in the Financial Times, external, drawing on findings from Soccernomics by Simon Kuper and Stefan Szymanski, argues that player quality and spending remain stronger predictors of results than managerial changes alone.
Sports consultancy Twenty First Group says coaches often succeed or fail according to the environment they inherit as much as their own abilities.
Since the Premier League began in 1992, only six managers have won the title in their first season in charge of their club.
Mourinho became the first to achieve the feat with Chelsea in 2004-05, before Carlo Ancelotti repeated it with the same club in 2009-10.
Manuel Pellegrini guided Manchester City to the title in his debut campaign in 2013-14, Claudio Ranieri masterminded Leicester City’s remarkable triumph in 2015-16, Conte won the league in his first season at Chelsea in 2016-17, and most recently Slot led Liverpool to the championship in his maiden campaign in 2025-26.
With almost half the division beginning the campaign under new leadership, the Premier League enters one of its most unpredictable seasons in recent memory.
