That has also been followed by three red cards, with Marlon Pack and Joe Morrell the only players to be given their marching orders for the Blues to date.
Indeed, John Mousinho’s men received just one yellow card during their 4-0 romp of Cheltenham on Saturday, while five players were booked for the visitors.
But how does Pompey’s tally compare to their League One rivals?
We’ve taken a look at Transfermarkt, who use a points-based system to rank each club in the division.
For example, a yellow card is worth one point, a yellow-red card is three points and a straight red card is five points.
Here’s who are the nicest and dirtiest side’s in League One re this season.
17. Charlton
Disciplinary points: 58; Yellow cards: 47; Yellow-red cards: 2; Straight red cards: 1. Photo: GLYN KIRK
18. Burton
Disciplinary points: 58; Yellow cards: 43; Yellow-red cards: 0; Straight red cards: 3. Photo: Nathan Stirk
19. Port Vale
Disciplinary points: 58; Yellow cards: 58; Yellow-red cards: 0; Straight red cards: 0. Photo: Naomi Baker
20. Sheffield Wednesday
Disciplinary points: 56; Yellow cards: 48; Yellow-red cards: 1; Straight red cards: 1. Photo: Ashley Allen