| Penalties | Players | Competition |
|---|---|---|
| 14 | Felipe Contepomi | Heineken Cup 2002/03 |
| 6 | Callum Sheedy | European Rugby Champions Cup 20/21 |
| 5 | David Hill | Heineken Cup 07/08 |
| 4 | Jason Strange | Heineken Cup 07/08 |
| 4 | Shane Drahm | Heineken Cup 2002/03 |
| 1 | Callum Sheedy | European Rugby Champions Cup 21/22 |
