International Twenty20 Bowling Against Each Opponent by Kevin O'Brien
| Opponent | Balls | Mdns | Runs | Wkts | BB | Ave | 4wI | 5wI | SRate | Econ |
| Afghanistan | 174 | 0 | 287 | 8 | 4-45 | 35.87 | 1 | 0 | 21.75 | 9.89 |
| Australia | 18 | 0 | 18 | 1 | 1-18 | 18.00 | 0 | 0 | 18.00 | 6.00 |
| Bangladesh | 54 | 0 | 71 | 2 | 1-23 | 35.50 | 0 | 0 | 27.00 | 7.88 |
| Bermuda | 12 | 0 | 14 | 0 | | | | | | 7.00 |
| Canada | 36 | 0 | 60 | 0 | | | | | | 10.00 |
| England | 18 | 0 | 22 | 2 | 2-22 | 11.00 | 0 | 0 | 9.00 | 7.33 |
| Hong Kong | 48 | 0 | 71 | 4 | 3-32 | 17.75 | 0 | 0 | 12.00 | 8.87 |
| India | 54 | 0 | 93 | 4 | 3-40 | 23.25 | 0 | 0 | 13.50 | 10.33 |
| Kenya | 36 | 0 | 34 | 3 | 2-15 | 11.33 | 0 | 0 | 12.00 | 5.66 |
| Namibia | 14 | 0 | 15 | 0 | | | | | | 6.42 |
| Nepal | 24 | 0 | 8 | 3 | 3-8 | 2.66 | 0 | 0 | 8.00 | 2.00 |
| Netherlands | 78 | 0 | 93 | 7 | 3-26 | 13.28 | 0 | 0 | 11.14 | 7.15 |
| New Zealand | 24 | 0 | 31 | 0 | | | | | | 7.75 |
| Oman | 24 | 0 | 25 | 2 | 2-25 | 12.50 | 0 | 0 | 12.00 | 6.25 |
| Papua New Guinea | 66 | 0 | 46 | 5 | 2-10 | 9.20 | 0 | 0 | 13.20 | 4.18 |
| Scotland | 99 | 0 | 117 | 8 | 3-35 | 14.62 | 0 | 0 | 12.37 | 7.09 |
| Sri Lanka | 6 | 0 | 9 | 0 | | | | | | 9.00 |
| United Arab Emirates | 72 | 0 | 68 | 6 | 3-14 | 11.33 | 0 | 0 | 12.00 | 5.66 |
| West Indies | 42 | 0 | 41 | 3 | 2-17 | 13.66 | 0 | 0 | 14.00 | 5.85 |
| Zimbabwe | 18 | 0 | 26 | 0 | | | | | | 8.66 |