We've taken a look at the number of yellow and red cards Championship sides have had this season, as well as the total number of fouls (via WhoScored data), and awarded half a point for a foul, one for a yellow, three for a yellow/red and five for a straight red to calculate the 'dirty' rating. Here's a look at how Preston North End and their divisional rivals rank in the table.
9. Barnsley - Dirty rating total score: 92
Fouls: 138. Yellow cards: 15. Yellow then Red cards: 1. Straight red cards: 1. Photo: George Wood
10. Coventry City - Dirty rating total score: 92
Fouls: 130. Yellow cards: 17. Yellow then Red cards: 0. Straight red cards: 2. Photo: David Rogers
11. Huddersfield Town - Dirty rating total score: 91.5
Fouls: 139. Yellow cards: 17. Yellow then Red cards: 0. Straight red cards: 1. Photo: Clive Rose
12. Bournemouth - Dirty rating total score: 90.5
Fouls: 139. Yellow cards: 16. Yellow then Red cards: 0. Straight red cards: 1. Photo: Marc Atkins