Head to Head
| Prem Rugby | 2015/03/07 15:00 | Harlequins v London Irish | W | 26-20 |
| Prem Rugby | 2014/09/06 15:30 | London Irish v Harlequins | W | 15-20 |
Home History
| Premiership Rugby Shield | 2015/11/23 19:30 | L. Wasps v Harlequins | W | 28-38 |
| European Rugby Challenge Cup | 2015/11/19 19:45 | Cardiff Blues v Harlequins | W | 20-32 |
| European Rugby Challenge Cup | 2015/11/12 19:45 | Harlequins v Montpellier | W | 41-18 |
| Prem Rugby | 2015/11/06 19:45 | Harlequins v Sale Sharks | W | 16-14 |
| Prem Rugby | 2015/10/31 13:30 | Bath v Harlequins | W | 28-38 |
| Prem Rugby | 2015/10/25 14:00 | Leicester v Harlequins | L | 22-19 |
| Prem Rugby | 2015/10/16 18:45 | Harlequins v Wasps | W | 26-21 |
| Prem Rugby | 2015/05/16 14:30 | Newcastle Red Bulls v Harlequins | L | 37-21 |
Away History
| European Rugby Challenge Cup | 2015/11/21 19:45 | Grenoble v London Irish | L | 27-20 |
| European Rugby Challenge Cup | 2015/11/14 15:00 | London Irish v Agen | W | 48-10 |
| Prem Rugby | 2015/11/07 15:00 | London Irish v Bath | L | 14-45 |
| Prem Rugby | 2015/10/31 13:00 | Saracens v London Irish | L | 24-14 |
| Prem Rugby | 2015/10/24 17:00 | Exeter Chiefs v London Irish | L | 38-11 |
| Prem Rugby | 2015/10/18 14:15 | London Irish v Leicester | L | 16-28 |
| Prem Rugby | 2015/05/16 14:30 | London Irish v Wasps | D | 40-40 |
| Prem Rugby | 2015/05/09 14:00 | Gloucester v London Irish | L | 35-13 |