In the meantime, we've taken a look at how the career win percentage of every League One boss ranks ahead of the new campaign. This is how Sunderland boss Phil Parkinson shapes up against all 23 of his third-tier managerial adversaries for the 2020/21 season.
5. Gillingham - Steve Evans
Career win percentage: 43%. Number of games at current club: 43. Photo: Julian Finney
6. Northampton Town - Keith Curle
Career win percentage: 41.8%. Number of games at current club: 91. Photo: Pete Norton
7. Accrington Stanley - John Coleman
Career win percentage: 41.4%. Number of games at current club: 303. Photo: George Wood
8. Charlton Athletic - Lee Bowyer
Career win percentage: 41.4%. Number of games at current club: 116. Photo: Lewis Storey