First-Class Bowling in Each Season by Richard de Groen
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM |
| 1987-88 | (New Zealand) | 1017 | 35 | 551 | 15 | 4-71 | 36.73 | 0 | 0 |
| 1988-89 | (New Zealand) | 468 | 15 | 215 | 3 | 1-39 | 71.66 | 0 | 0 |
| 1989-90 | (New Zealand) | 600 | 18 | 279 | 10 | 5-47 | 27.90 | 1 | 0 |
| 1990-91 | (New Zealand) | 1755 | 70 | 803 | 35 | 6-28 | 22.94 | 1 | 0 |
| 1991-92 | (New Zealand) | 1686 | 85 | 664 | 25 | 5-18 | 26.56 | 1 | 0 |
| 1992-93 | (New Zealand) | 2284 | 139 | 775 | 46 | 7-50 | 16.84 | 3 | 1 |
| 1993-94 | (Australia) | 738 | 40 | 313 | 8 | 3-50 | 39.12 | 0 | 0 |
| 1993-94 | (New Zealand) | 852 | 37 | 420 | 12 | 5-89 | 35.00 | 1 | 0 |
| 1994-95 | (New Zealand) | 1114 | 42 | 494 | 24 | 6-72 | 20.58 | 1 | 0 |
| 1994-95 | (South Africa) | 660 | 26 | 299 | 10 | 5-34 | 29.90 | 1 | 0 |
| 1995-96 | (New Zealand) | 1178 | 64 | 453 | 22 | 7-58 | 20.59 | 1 | 1 |