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.
13. Lincoln City - Michael Appleton
Career win percentage: 38.2%. Number of games at current club: 29. Photo: Stu Forster
14. Fleetwood Town - Joey Barton
Career win percentage: 38%. Number of games at current club: 100. Photo: Warren Little
15. Ipswich Town - Paul Lambert
Career win percentage: 36.8%. Number of games at current club: 78. Photo: Lewis Storey
16. Rochdale - Brian Barry-Murphy
Career win percentage: 36.8%. Number of games at current club: 57. Photo: Morgan Harlow