But who are those 30 ex-players and where are they now?
We’ve taken a look to find out.
1.James Bolton
Departure date: June 24, 2021; Transfer: Undisclosed fee (Plymouth); Current club: Plymouth; Appearances since: 14 apps, 0 goals.
Photo: Joe Pepler
2.George Byers
Departure date: June 1, 2021; Transfer: loan return to parent club Swansea; Current club: Sheffield Wednesday (permanent); Appearances since: 37 apps, 10 goals (all for Sheff Wed).
Photo: Paul Thompson
3. Andy Canon
Departure date: June 16, 2021; Transfer: Undisclosed fee (Hull); Current club: Hull; Appearances since: 17 apps, one goal (Hull) & nine apps, one goal (Stockport – 2021-22) .
Photo: Jason Brown
4. Ben Close
Departure date: June 7, 2021; Transfer: Free (Doncaster Rovers); Current club: Doncaster Rovers; Appearances since: 19 apps, 0 goals.
Photo: Joe Pepler