| Penalties | Players | VS Club | Date | |
|---|---|---|---|---|
| 6 | Morgan Parra | Saracens | 17-12-2017 | Match details |
| 4 | Morgan Parra | Racing CF | 01-04-2018 | Match details |
| 3 | Morgan Parra | Ospreys | 15-10-2017 | Match details |
| 3 | Morgan Parra | Northampton Saints | 13-01-2018 | Match details |
| 3 | Morgan Parra | Ospreys | 20-01-2018 | Match details |
| 2 | Morgan Parra | Saracens | 11-12-2017 | Match details |
| 2 | Scott Spedding | Saracens | 17-12-2017 | Match details |
| 1 | Scott Spedding | Ospreys | 15-10-2017 | Match details |
| 1 | Greig Laidlaw | Ospreys | 20-01-2018 | Match details |
