Marlon Pack has been the Blues’ bad boy having been given his marching orders on two occasions, while Joe Morrell and Joe Pigott have also received a dismissal.
John Mousinho’s men have also picked up 57 yellow cards to date on top of their red card.
But how do Pompey compare as the dirtiest side in League One.
Using Transfermarkt’s fair play table, we’ve been able to discover where the Blues rank alongside their third-tier rivals.
Their disciplinary points tally is accumulated with yellow cards worth one point, a yellow-red card is valued at three points, while a straight red card picks up five points.
Here’s where the Blues sit.
9. Morecambe
Yellow cards: 74; Yellow/red cards: 1; Straight red cards: 1; Disciplinary points: 82. Photo: Lewis Storey
10. Derby
Yellow cards: 69; Yellow/red cards: 0; Straight red cards: 2; Disciplinary points: 79. Photo: Cameron Smith
11. MK Dons
Yellow cards: 71; Yellow/red cards: 0; Straight red cards: 1; Disciplinary points: 76. Photo: Pete Norton
12. Oxford United
Yellow cards: 65; Yellow/red cards: 2; Straight red cards: 1; Disciplinary points: 76. Photo: Richard Heathcote