First-Class Bowling in Each Season by Hedley Howarth
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM |
| 1962-63 | (New Zealand) | 180 | 6 | 85 | 1 | 1-45 | 85.00 | 0 | 0 |
| 1963-64 | (New Zealand) | 889 | 35 | 433 | 18 | 5-32 | 24.05 | 1 | 0 |
| 1964-65 | (New Zealand) | 695 | 33 | 282 | 8 | 3-51 | 35.25 | 0 | 0 |
| 1965-66 | (New Zealand) | 746 | 38 | 291 | 12 | 4-34 | 24.25 | 0 | 0 |
| 1966-67 | (New Zealand) | 1460 | 80 | 471 | 25 | 4-31 | 18.84 | 0 | 0 |
| 1967-68 | (New Zealand) | 1047 | 75 | 223 | 14 | 6-23 | 15.92 | 1 | 0 |
| 1968-69 | (New Zealand) | 1765 | 63 | 578 | 36 | 6-29 | 16.05 | 4 | 0 |
| 1969 | (Scotland) | 246 | 17 | 72 | 6 | 3-10 | 12.00 | 0 | 0 |
| 1969 | (England) | 3095 | 202 | 1054 | 51 | 7-43 | 20.66 | 3 | 0 |
| 1969-70 | (Pakistan) | 869 | 51 | 323 | 16 | 5-80 | 20.18 | 1 | 0 |
| 1969-70 | (India) | 756 | 46 | 218 | 12 | 5-34 | 18.16 | 1 | 0 |
| 1969-70 | (New Zealand) | 657 | 20 | 248 | 7 | 5-61 | 35.42 | 1 | 0 |
| 1969-70 | (Australia) | 648 | 18 | 258 | 8 | 5-32 | 32.25 | 1 | 0 |
| 1970-71 | (Australia) | 184 | 4 | 58 | 0 | | | | |
| 1970-71 | (New Zealand) | 1883 | 57 | 687 | 21 | 4-46 | 32.71 | 0 | 0 |
| 1971-72 | (West Indies) | 2769 | 129 | 1029 | 22 | 4-102 | 46.77 | 0 | 0 |
| 1971-72 | (Bermuda) | 207 | 11 | 73 | 10 | 5-32 | 7.30 | 2 | 1 |
| 1971-72 | (New Zealand) | 2117 | 76 | 663 | 31 | 5-34 | 21.38 | 1 | 0 |
| 1972-73 | (New Zealand) | 3009 | 84 | 1146 | 49 | 7-48 | 23.38 | 4 | 1 |
| 1973 | (England) | 2727 | 134 | 1139 | 31 | 5-70 | 36.74 | 2 | 1 |
| 1973-74 | (New Zealand) | 2800 | 81 | 1011 | 40 | 7-42 | 25.27 | 3 | 1 |
| 1974-75 | (New Zealand) | 2508 | 80 | 920 | 38 | 5-77 | 24.21 | 1 | 0 |
| 1975-76 | (New Zealand) | 2599 | 90 | 863 | 34 | 7-75 | 25.38 | 2 | 1 |
| 1976-77 | (New Zealand) | 2252 | 52 | 1053 | 34 | 8-75 | 30.97 | 1 | 1 |
| 1977-78 | (New Zealand) | 542 | 16 | 204 | 9 | 5-56 | 22.66 | 1 | 0 |
| 1978-79 | (New Zealand) | 771 | 24 | 292 | 8 | 5-70 | 36.50 | 1 | 0 |