First-Class Bowling Against Each Opponent Richard de Groen
| Opponent | Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM |
| Auckland | 1589 | 82 | 622 | 31 | 5-18 | 20.06 | 2 | 0 |
| Australia | 492 | 23 | 233 | 3 | 2-113 | 77.66 | 0 | 0 |
| Canterbury | 2207 | 91 | 1024 | 44 | 7-58 | 23.27 | 2 | 1 |
| Central Districts | 1935 | 88 | 778 | 30 | 5-89 | 25.93 | 1 | 0 |
| England XI | 180 | 8 | 82 | 1 | 1-36 | 82.00 | 0 | 0 |
| Griqualand West | 222 | 11 | 102 | 7 | 5-34 | 14.57 | 1 | 0 |
| Northern Districts | 168 | 11 | 55 | 1 | 1-41 | 55.00 | 0 | 0 |
| Orange Free State | 240 | 9 | 117 | 0 | | | | |
| Otago | 2419 | 131 | 932 | 46 | 7-50 | 20.26 | 2 | 1 |
| Pakistan | 370 | 16 | 192 | 5 | 3-40 | 38.40 | 0 | 0 |
| Pakistanis | 162 | 3 | 97 | 2 | 1-38 | 48.50 | 0 | 0 |
| South Africa | 198 | 6 | 80 | 3 | 2-59 | 26.66 | 0 | 0 |
| South Australia | 246 | 17 | 80 | 5 | 3-50 | 16.00 | 0 | 0 |
| Wellington | 1924 | 75 | 872 | 32 | 6-28 | 27.25 | 2 | 0 |