First-Class Bowling in Each Season by Dayle Hadlee
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM |
| 1966-67 | (New Zealand) | 120 | 8 | 53 | 0 | | | | |
| 1968-69 | (New Zealand) | 374 | 6 | 179 | 8 | 3-46 | 22.37 | 0 | 0 |
| 1969 | (England) | 1156 | 49 | 578 | 19 | 4-88 | 30.42 | 0 | 0 |
| 1969 | (Scotland) | 119 | 8 | 43 | 4 | 3-3 | 10.75 | 0 | 0 |
| 1969-70 | (Pakistan) | 488 | 19 | 153 | 8 | 3-27 | 19.12 | 0 | 0 |
| 1969-70 | (India) | 558 | 30 | 204 | 13 | 4-30 | 15.69 | 0 | 0 |
| 1969-70 | (New Zealand) | 224 | 1 | 130 | 1 | 1-29 | 130.00 | 0 | 0 |
| 1969-70 | (Australia) | 440 | 5 | 234 | 10 | 4-56 | 23.40 | 0 | 0 |
| 1971-72 | (New Zealand) | 335 | 4 | 163 | 4 | 2-43 | 40.75 | 0 | 0 |
| 1972-73 | (New Zealand) | 1498 | 35 | 667 | 35 | 7-88 | 19.05 | 3 | 1 |
| 1973 | (England) | 1996 | 58 | 980 | 38 | 5-35 | 25.78 | 1 | 0 |
| 1973-74 | (Australia) | 1709 | 19 | 908 | 26 | 4-52 | 34.92 | 0 | 0 |
| 1973-74 | (New Zealand) | 982 | 16 | 543 | 12 | 4-75 | 45.25 | 0 | 0 |
| 1974-75 | (New Zealand) | 1879 | 45 | 779 | 30 | 5-59 | 25.96 | 1 | 0 |
| 1975-76 | (New Zealand) | 2119 | 55 | 814 | 37 | 5-44 | 22.00 | 3 | 1 |
| 1976-77 | (New Zealand) | 1435 | 35 | 608 | 22 | 5-75 | 27.63 | 1 | 0 |
| 1977-78 | (New Zealand) | 2177 | 50 | 758 | 32 | 7-55 | 23.68 | 2 | 1 |
| 1978 | (England) | 96 | 0 | 70 | 1 | 1-70 | 70.00 | 0 | 0 |
| 1979-80 | (New Zealand) | 1384 | 65 | 567 | 27 | 4-28 | 21.00 | 0 | 0 |
| 1982-83 | (New Zealand) | 326 | 17 | 135 | 7 | 4-58 | 19.28 | 0 | 0 |
| 1983-84 | (New Zealand) | 701 | 30 | 287 | 17 | 4-39 | 16.88 | 0 | 0 |