List A Batting and Fielding in Each Season by Greig Williamson
| Season | | Matches | Inns | Not Out | Runs | HS | Ave | 100 | 50 | Ct | St |
| 1989 | (England) | 1 | 0 | | | | | | | 0 | |
| 1994 | (England) | 2 | 2 | 0 | 6 | 4 | 3.00 | 0 | 0 | 1 | |
| 1995 | (England) | 3 | 3 | 0 | 25 | 24 | 8.33 | 0 | 0 | 0 | |
| 1995 | (Scotland) | 1 | 1 | 0 | 19 | 19 | 19.00 | 0 | 0 | 0 | |
| 1996 | (England) | 3 | 3 | 0 | 10 | 8 | 3.33 | 0 | 0 | 0 | |
| 1996 | (Scotland) | 2 | 2 | 1 | 63 | 51* | 63.00 | 0 | 1 | 0 | |
| 1997 | (England) | 3 | 3 | 0 | 43 | 26 | 14.33 | 0 | 0 | 0 | |
| 1997 | (Scotland) | 1 | 1 | 0 | 24 | 24 | 24.00 | 0 | 0 | 1 | |
| 1998 | (England) | 1 | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | |
| 1998 | (Scotland) | 4 | 4 | 0 | 39 | 20 | 9.75 | 0 | 0 | 0 | |
| 1998-99 | (Malaysia) | 2 | 2 | 0 | 40 | 25 | 20.00 | 0 | 0 | 0 | |
| 1999 | (England) | 1 | 1 | 0 | 1 | 1 | 1.00 | 0 | 0 | 0 | |
| 1999 | (Scotland) | 1 | 1 | 0 | 10 | 10 | 10.00 | 0 | 0 | 0 | |
| 1999-00 | (Zimbabwe) | 4 | 4 | 1 | 80 | 48 | 26.66 | 0 | 0 | 0 | |
| 2000 | (England) | 1 | 1 | 0 | 14 | 14 | 14.00 | 0 | 0 | 0 | |
| 2001 | (England) | 1 | 1 | 0 | 16 | 16 | 16.00 | 0 | 0 | 1 | |
| 2001 | (Scotland) | 1 | 0 | | | | | | | 1 | |
| 2002 | (Scotland) | 2 | 2 | 0 | 50 | 28 | 25.00 | 0 | 0 | 1 | |
| 2003 | (England) | 6 | 5 | 0 | 89 | 60 | 17.80 | 0 | 1 | 2 | |
| 2003 | (Scotland) | 9 | 8 | 0 | 150 | 77 | 18.75 | 0 | 1 | 1 | |
| 2003-04 | (United Arab Emirates) | 3 | 3 | 0 | 16 | 8 | 5.33 | 0 | 0 | 1 | |
| 2004 | (Scotland) | 2 | 2 | 1 | 0 | 0* | 0.00 | 0 | 0 | 0 | |
| 2004 | (England) | 1 | 1 | 0 | 2 | 2 | 2.00 | 0 | 0 | 0 | |
| 2005 | (Ireland) | 3 | 2 | 2 | 33 | 25* | | 0 | 0 | 1 | |
| 2005 | (Scotland) | 5 | 5 | 0 | 18 | 8 | 3.60 | 0 | 0 | 0 | |