List A Bowling in Each Season by Greig Williamson
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 4wI | 5wI | SRate | Econ |
| 1989 | (England) | 18 | 0 | 9 | 0 | | | | | | 3.00 |
| 1994 | (England) | 108 | 2 | 64 | 1 | 1-24 | 64.00 | 0 | 0 | 108.00 | 3.55 |
| 1995 | (England) | 90 | 0 | 96 | 1 | 1-65 | 96.00 | 0 | 0 | 90.00 | 6.40 |
| 1995 | (Scotland) | 30 | 0 | 17 | 0 | | | | | | 3.40 |
| 1996 | (England) | 120 | 2 | 105 | 3 | 2-54 | 35.00 | 0 | 0 | 40.00 | 5.25 |
| 1996 | (Scotland) | 78 | 2 | 67 | 0 | | | | | | 5.15 |
| 1997 | (England) | 136 | 0 | 135 | 3 | 2-61 | 45.00 | 0 | 0 | 45.33 | 5.95 |
| 1997 | (Scotland) | 12 | 0 | 19 | 0 | | | | | | 9.50 |
| 1998 | (England) | | 0 | 0 | 0 | | | | | | 0.00 |
| 1998 | (Scotland) | 126 | 0 | 102 | 4 | 2-45 | 25.50 | 0 | 0 | 31.50 | 4.85 |
| 1998-99 | (Malaysia) | 18 | 0 | 28 | 0 | | | | | | 9.33 |
| 1999 | (England) | | 0 | 0 | 0 | | | | | | 0.00 |
| 1999 | (Scotland) | | 0 | 0 | 0 | | | | | | 0.00 |
| 1999-00 | (Zimbabwe) | 108 | 4 | 94 | 3 | 3-34 | 31.33 | 0 | 0 | 36.00 | 5.22 |
| 2000 | (England) | | 0 | 0 | 0 | | | | | | 0.00 |
| 2001 | (England) | 18 | 1 | 20 | 0 | | | | | | 6.66 |
| 2001 | (Scotland) | | 0 | 0 | 0 | | | | | | 0.00 |
| 2002 | (Scotland) | 30 | 0 | 26 | 1 | 1-26 | 26.00 | 0 | 0 | 30.00 | 5.20 |
| 2003 | (England) | 12 | 0 | 19 | 0 | | | | | | 9.50 |
| 2003 | (Scotland) | 60 | 0 | 68 | 3 | 3-38 | 22.66 | 0 | 0 | 20.00 | 6.80 |
| 2003-04 | (United Arab Emirates) | | 0 | 0 | 0 | | | | | | 0.00 |
| 2004 | (Scotland) | 6 | 0 | 11 | 0 | | | | | | 11.00 |
| 2004 | (England) | | 0 | 0 | 0 | | | | | | 0.00 |
| 2005 | (Scotland) | 25 | 0 | 34 | 0 | | | | | | 8.16 |
| 2005 | (Ireland) | 36 | 0 | 17 | 1 | 1-17 | 17.00 | 0 | 0 | 36.00 | 2.83 |