| Points | Players | VS Club | Date | |
|---|---|---|---|---|
| 18 | Alan McGowan | Scarlets | 19-09-1998 | Match details |
| 17 | Alan McGowan | Scarlets | 06-11-1998 | Match details |
| 16 | Alan McGowan | Stade Francais | 17-10-1998 | Match details |
| 12 | Alan McGowan | Stade Francais | 25-09-1998 | Match details |
| 10 | Declan O'Brien | Scarlets | 06-11-1998 | Match details |
| 9 | Ritchie Murphy | Begles-Bordeaux | 09-10-1998 | Match details |
| 5 | Martin Ridge | Stade Francais | 25-09-1998 | Match details |
| 5 | J McWeeney | Stade Francais | 17-10-1998 | Match details |
| 5 | Girvan Dempsey | Stade Francais | 17-10-1998 | Match details |
| 5 | Alan McGowan | Begles-Bordeaux | 31-10-1998 | Match details |
| 5 | Colin McEntee | Begles-Bordeaux | 31-10-1998 | Match details |
| 5 | Shane Byrne | Scarlets | 19-09-1998 | Match details |
| 5 | Gordon D'Arcy | Scarlets | 19-09-1998 | Match details |
