Most Runs Conceded in an Innings against Middlesex
| 61 | Azhar Mahmood | v Kent | St Lawrence Ground, Canterbury | 2012 | tt3008 |
| 53 | SJ Marshall | v Lancashire | The Brit Oval, Kennington | 2008 | tt997 |
| 52 | SW Tait | v Glamorgan | Old Deer Park, Richmond | 2010 | tt1764 |
| 52 | JAR Harris | v Glamorgan | Old Deer Park, Richmond | 2010 | tt1764 |