Twenty20 Bowling in Each Season by Christi Viljoen
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 4wI | 5wI | SRate | Econ |
| 2009-10 | (Zimbabwe) | 120 | 0 | 101 | 6 | 2-14 | 16.83 | 0 | 0 | 20.00 | 5.05 |
| 2010-11 | (Namibia) | 18 | 0 | 19 | 0 | | | | | | 6.33 |
| 2011-12 | (South Africa) | 37 | 0 | 51 | 2 | 1-19 | 25.50 | 0 | 0 | 18.50 | 8.27 |
| 2011-12 | (United Arab Emirates) | 152 | 0 | 178 | 14 | 4-8 | 12.71 | 1 | 0 | 10.85 | 7.02 |
| 2011-12 | (Namibia) | 132 | 1 | 171 | 8 | 5-23 | 21.37 | 0 | 1 | 16.50 | 7.77 |
| 2012-13 | (South Africa) | 60 | 0 | 61 | 3 | 2-17 | 20.33 | 0 | 0 | 20.00 | 6.10 |
| 2012-13 | (Namibia) | 71 | 1 | 66 | 5 | 3-7 | 13.20 | 0 | 0 | 14.20 | 5.57 |
| 2013 | (Namibia) | 66 | 0 | 79 | 1 | 1-23 | 79.00 | 0 | 0 | 66.00 | 7.18 |
| 2013-14 | (United Arab Emirates) | 122 | 0 | 136 | 3 | 2-18 | 45.33 | 0 | 0 | 40.66 | 6.68 |
| 2013-14 | (Namibia) | 18 | 0 | 6 | 2 | 2-6 | 3.00 | 0 | 0 | 9.00 | 2.00 |
| 2013-14 | (South Africa) | 6 | 0 | 9 | 0 | | | | | | 9.00 |
| 2014-15 | (South Africa) | 18 | 0 | 16 | 0 | | | | | | 5.33 |
| 2014-15 | (Namibia) | 48 | 0 | 44 | 2 | 2-14 | 22.00 | 0 | 0 | 24.00 | 5.50 |
| 2016-17 | (New Zealand) | 95 | 0 | 128 | 5 | 2-9 | 25.60 | 0 | 0 | 19.00 | 8.08 |
| 2017-18 | (New Zealand) | 24 | 0 | 22 | 1 | 1-22 | 22.00 | 0 | 0 | 24.00 | 5.50 |
| 2018-19 | (New Zealand) | 138 | 0 | 198 | 12 | 4-23 | 16.50 | 1 | 0 | 11.50 | 8.60 |
| 2019 | (Uganda) | 54 | 0 | 29 | 9 | 5-9 | 3.22 | 1 | 1 | 6.00 | 3.22 |
| 2019-20 | (United Arab Emirates) | 169 | 0 | 207 | 11 | 3-14 | 18.81 | 0 | 0 | 15.36 | 7.34 |