First-Class Bowling in Each Season by Stu Duff
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM |
| 1985-86 | (New Zealand) | 1310 | 57 | 604 | 21 | 6-36 | 28.76 | 1 | 1 |
| 1986-87 | (New Zealand) | 1147 | 55 | 583 | 17 | 4-63 | 34.29 | 0 | 0 |
| 1987-88 | (New Zealand) | 898 | 45 | 410 | 12 | 3-25 | 34.16 | 0 | 0 |
| 1988-89 | (Zimbabwe) | 464 | 18 | 195 | 9 | 5-77 | 21.66 | 1 | 0 |
| 1988-89 | (New Zealand) | 2008 | 92 | 911 | 27 | 4-87 | 33.74 | 0 | 0 |
| 1989-90 | (New Zealand) | 1832 | 73 | 810 | 29 | 6-46 | 27.93 | 2 | 1 |
| 1990-91 | (New Zealand) | 2008 | 81 | 1002 | 20 | 5-36 | 50.10 | 1 | 0 |
| 1991-92 | (New Zealand) | 1945 | 103 | 774 | 28 | 4-13 | 27.64 | 0 | 0 |
| 1992-93 | (New Zealand) | 890 | 45 | 356 | 12 | 3-46 | 29.66 | 0 | 0 |
| 1993-94 | (New Zealand) | 1622 | 70 | 583 | 18 | 4-111 | 32.38 | 0 | 0 |
| 1994-95 | (New Zealand) | 1493 | 95 | 483 | 12 | 3-35 | 40.25 | 0 | 0 |
| 1995-96 | (New Zealand) | 1138 | 68 | 340 | 12 | 4-41 | 28.33 | 0 | 0 |