Head to Head
| Prem Rugby | 2015/12/05 15:00 | Harlequins v London Irish | L | 38-7 |
| Prem Rugby | 2015/03/07 15:00 | Harlequins v London Irish | L | 26-20 |
| Prem Rugby | 2014/09/06 15:30 | London Irish v Harlequins | L | 15-20 |
| Prem Rugby | 2015/12/05 15:00 | Harlequins v London Irish | L | 38-7 |
| Prem Rugby | 2015/03/07 15:00 | Harlequins v London Irish | L | 26-20 |
| Prem Rugby | 2014/09/06 15:30 | London Irish v Harlequins | L | 15-20 |