Highest Score in Each Batting Position Against Middlesex
| 1 | 119 | KJ O'Brien | for Gloucestershire | Uxbridge Cricket Club Ground, Uxbridge | 2011 | | tt2278 |
| 2 | 102 | HJH Marshall | for Gloucestershire | Uxbridge Cricket Club Ground, Uxbridge | 2011 | | tt2278 |
| 3 | 85* | MR Ramprakash | for Surrey | The Brit Oval, Kennington | 2007 | | tt648 |
| 4 | 102 | RN ten Doeschate | for Essex | Lord's Cricket Ground, St John's Wood | 2010 | | tt1759 |
| 5 | 89* | KA Pollard | for Somerset | Lord's Cricket Ground, St John's Wood | 2010 | | tt1740 |
| 6 | 54* | GC Wilson | for Surrey | Lord's Cricket Ground, St John's Wood | 2012 | | tt2966 |
| 7 | 62* | JS Foster | for Essex | John Walker's Ground, Southgate | 2005 | | tt211 |
| 8 | 41* | OP Rayner | for Sussex | County Ground, Hove | 2010 | | tt1823 |
| 9 | 31 | GR Napier | for Essex | The Ford County Ground, Chelmsford | 2008 | | tt932 |
| 10 | 22 | WAT Beer | for Sussex | County Ground, Hove | 2010 | | tt1823 |
| 11 | 13* | CK Langeveldt | for Kent | St Lawrence Ground, Canterbury | 2011 | | tt2252 |
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