Most Runs Conceded in an Innings for Middlesex
| 58 | T Henderson | v Kent | The Rose Bowl, Southampton | 2008 | tt1002 |
| 57 | AJ Ireland | v Gloucestershire | Uxbridge Cricket Club Ground, Uxbridge | 2011 | tt2278 |
| 56 | T Henderson | v Kent | Lord's Cricket Ground, St John's Wood | 2009 | tt1236 |
| 53 | PN Weekes | v Hampshire | The Rose Bowl, Southampton | 2005 | tt170 |
| 52 | TMJ Smith | v Gloucestershire | Uxbridge Cricket Club Ground, Uxbridge | 2011 | tt2278 |
| 51 | MM Betts | v Surrey | The Brit Oval, Kennington | 2005 | tt198 |
| 50 | CT Peploe | v Hampshire | The Rose Bowl, Southampton | 2006 | tt376 |
| 50 | R McLaren | v Gloucestershire | Uxbridge Cricket Club Ground, Uxbridge | 2011 | tt2278 |