Twenty20 Bowling in Each Season by Jacob Duffy
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 4wI | 5wI | SRate | Econ |
| 2011-12 | (New Zealand) | 24 | 1 | 19 | 3 | 3-19 | 6.33 | 0 | 0 | 8.00 | 4.75 |
| 2012-13 | (New Zealand) | 240 | 0 | 325 | 15 | 4-21 | 21.66 | 1 | 0 | 16.00 | 8.12 |
| 2013-14 | (New Zealand) | 149 | 0 | 217 | 10 | 3-29 | 21.70 | 0 | 0 | 14.90 | 8.73 |
| 2014-15 | (New Zealand) | 119 | 0 | 192 | 3 | 2-21 | 64.00 | 0 | 0 | 39.66 | 9.68 |
| 2015-16 | (New Zealand) | 228 | 1 | 349 | 15 | 5-18 | 23.26 | 0 | 1 | 15.20 | 9.18 |
| 2016-17 | (New Zealand) | 30 | 0 | 79 | 1 | 1-45 | 79.00 | 0 | 0 | 30.00 | 15.80 |
| 2017-18 | (New Zealand) | 90 | 0 | 153 | 8 | 5-39 | 19.12 | 0 | 1 | 11.25 | 10.20 |
| 2018-19 | (New Zealand) | 198 | 1 | 256 | 13 | 3-18 | 19.69 | 0 | 0 | 15.23 | 7.75 |
| 2019-20 | (New Zealand) | 227 | 0 | 306 | 11 | 2-27 | 27.81 | 0 | 0 | 20.63 | 8.08 |
| 2020-21 | (New Zealand) | 246 | 0 | 374 | 8 | 4-33 | 46.75 | 1 | 0 | 30.75 | 9.12 |
| 2021 | (Bangladesh) | 54 | 0 | 43 | 1 | 1-25 | 43.00 | 0 | 0 | 54.00 | 4.77 |
| 2021-22 | (New Zealand) | 206 | 0 | 318 | 6 | 3-30 | 53.00 | 0 | 0 | 34.33 | 9.26 |
| 2022 | (Ireland) | 60 | 0 | 89 | 4 | 2-20 | 22.25 | 0 | 0 | 15.00 | 8.90 |
| 2022 | (Scotland) | 18 | 0 | 24 | 0 | | | | | | 8.00 |
| 2022-23 | (New Zealand) | 85 | 0 | 134 | 3 | 2-27 | 44.66 | 0 | 0 | 28.33 | 9.45 |
| 2022-23 | (India) | 24 | 0 | 35 | 1 | 1-27 | 35.00 | 0 | 0 | 24.00 | 8.75 |
| 2023-24 | (Pakistan) | 60 | 0 | 88 | 1 | 1-39 | 88.00 | 0 | 0 | 60.00 | 8.80 |
| 2023-24 | (New Zealand) | 152 | 1 | 172 | 10 | 4-19 | 17.20 | 1 | 0 | 15.20 | 6.78 |
| 2024-25 | (Sri Lanka) | 24 | 0 | 29 | 0 | | | | | | 7.25 |
| 2024-25 | (New Zealand) | 296 | 0 | 329 | 26 | 4-14 | 12.65 | 3 | 0 | 11.38 | 6.66 |
| 2025 | (Zimbabwe) | 90 | 0 | 106 | 6 | 3-20 | 17.66 | 0 | 0 | 15.00 | 7.06 |
| 2025 | (England) | 288 | 0 | 412 | 18 | 3-26 | 22.88 | 0 | 0 | 16.00 | 8.58 |
| 2025-26 | (New Zealand) | 96 | 0 | 162 | 5 | 2-29 | 32.40 | 0 | 0 | 19.20 | 10.12 |