Twenty20 Batting and Fielding in Each Season by Graham Napier
| Season | | Matches | Inns | Not Out | Runs | HS | Ave | 100 | 50 | Ct | St |
| 2003 | (England) | 5 | 3 | 0 | 33 | 19 | 11.00 | 0 | 0 | 1 | |
| 2004 | (England) | 5 | 5 | 0 | 72 | 38 | 14.40 | 0 | 0 | 0 | |
| 2006 | (England) | 7 | 2 | 0 | 17 | 10 | 8.50 | 0 | 0 | 0 | |
| 2007 | (England) | 7 | 4 | 1 | 19 | 8* | 6.33 | 0 | 0 | 2 | |
| 2007-08 | (New Zealand) | 3 | 1 | 1 | 48 | 48* | | 0 | 0 | 0 | |
| 2008 | (England) | 12 | 11 | 1 | 326 | 152* | 32.60 | 1 | 0 | 3 | |
| 2008-09 | (New Zealand) | 8 | 7 | 0 | 52 | 20 | 7.42 | 0 | 0 | 4 | |
| 2009 | (South Africa) | 1 | 1 | 0 | 15 | 15 | 15.00 | 0 | 0 | 0 | |
| 2009 | (England) | 7 | 6 | 1 | 59 | 47 | 11.80 | 0 | 0 | 4 | |
| 2009-10 | (New Zealand) | 11 | 8 | 3 | 44 | 17* | 8.80 | 0 | 0 | 6 | |
| 2010 | (England) | 1 | 1 | 0 | 12 | 12 | 12.00 | 0 | 0 | 0 | |
| 2011 | (England) | 8 | 7 | 0 | 86 | 26 | 12.28 | 0 | 0 | 1 | |
| 2011-12 | (New Zealand) | 1 | 1 | 0 | 3 | 3 | 3.00 | 0 | 0 | 0 | |
| 2012 | (England) | 10 | 10 | 1 | 111 | 32 | 12.33 | 0 | 0 | 3 | |
| 2013 | (England) | 12 | 8 | 3 | 95 | 38* | 19.00 | 0 | 0 | 5 | |
| 2013-14 | (New Zealand) | 4 | 4 | 3 | 49 | 28* | 49.00 | 0 | 0 | 0 | |
| 2014 | (England) | 9 | 1 | 0 | 17 | 17 | 17.00 | 0 | 0 | 1 | |
| 2015 | (England) | 14 | 11 | 3 | 100 | 27 | 12.50 | 0 | 0 | 7 | |
| 2016 | (England) | 12 | 5 | 2 | 48 | 21* | 16.00 | 0 | 0 | 6 | |