First-Class Bowling in Each Season by Gary Robertson
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM |
| 1979-80 | (New Zealand) | 960 | 44 | 515 | 10 | 2-32 | 51.50 | 0 | 0 |
| 1980-81 | (New Zealand) | 1728 | 71 | 777 | 39 | 6-47 | 19.92 | 3 | 0 |
| 1981-82 | (New Zealand) | 600 | 30 | 248 | 7 | 3-57 | 35.42 | 0 | 0 |
| 1982-83 | (Australia) | 258 | 3 | 206 | 4 | 1-26 | 51.50 | 0 | 0 |
| 1982-83 | (New Zealand) | 1404 | 48 | 723 | 25 | 4-42 | 28.92 | 0 | 0 |
| 1983-84 | (New Zealand) | 1507 | 60 | 727 | 34 | 5-79 | 21.38 | 1 | 0 |
| 1984-85 | (Zimbabwe) | 270 | 3 | 220 | 6 | 3-113 | 36.66 | 0 | 0 |
| 1984-85 | (New Zealand) | 1301 | 31 | 737 | 21 | 3-51 | 35.09 | 0 | 0 |
| 1985-86 | (New Zealand) | 1618 | 41 | 967 | 32 | 5-47 | 30.21 | 1 | 0 |
| 1986-87 | (New Zealand) | 1191 | 39 | 628 | 25 | 6-47 | 25.12 | 2 | 1 |
| 1987-88 | (New Zealand) | 1342 | 53 | 635 | 23 | 5-34 | 27.60 | 1 | 0 |
| 1988-89 | (New Zealand) | 1215 | 34 | 654 | 17 | 5-44 | 38.47 | 1 | 0 |
| 1989-90 | (New Zealand) | 750 | 24 | 432 | 9 | 3-90 | 48.00 | 0 | 0 |