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 Cannon
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