Head to Head
| European Rugby Challenge Cup | 2016/04/09 19:05 | Harlequins v London Irish | L | 38-30 |
| Premiership Rugby | 2015/12/05 15:00 | Harlequins v London Irish | L | 38-7 |
| Premiership Rugby | 2015/03/07 15:00 | Harlequins v London Irish | L | 26-20 |
| Premiership Rugby | 2014/09/06 15:30 | London Irish v Harlequins | L | 15-20 |
Home History
| Premiership Rugby | 2016/04/17 14:00 | Newcastle Falcons v London Irish | L | 13-6 |
| European Rugby Challenge Cup | 2016/04/09 19:05 | Harlequins v London Irish | L | 38-30 |
| Premiership Rugby | 2016/04/02 14:00 | London Irish v Sale Sharks | L | 15-30 |
| Premiership Rugby | 2016/03/26 17:30 | Worcester Warriors v London Irish | L | 12-6 |
| Premiership Rugby | 2016/03/20 15:00 | London Irish v Gloucester | W | 23-18 |
| Premiership Rugby | 2016/03/12 20:00 | London Irish v Saracens | L | 16-26 |
| Premiership Rugby | 2016/03/05 15:15 | Bath v London Irish | L | 25-17 |
| Premiership Rugby | 2016/02/28 15:00 | Leicester v London Irish | L | 47-20 |
Away History
| European Rugby Challenge Cup | 2016/04/22 18:45 | Harlequins v Grenoble | W | 30-6 |
| Premiership Rugby | 2016/04/16 14:15 | Saracens v Harlequins | L | 22-12 |
| European Rugby Challenge Cup | 2016/04/09 19:05 | Harlequins v London Irish | W | 38-30 |
| Premiership Rugby | 2016/04/02 14:00 | Harlequins v Newcastle Falcons | W | 46-25 |
| Premiership Rugby Shield | 2016/03/28 18:30 | Saracens Storm v Harlequins | L | 28-21 |
| Premiership Rugby | 2016/03/27 14:15 | Northampton v Harlequins | L | 29-23 |
| Premiership Rugby | 2016/03/19 15:00 | Harlequins v Worcester Warriors | L | 15-21 |
| Premiership Rugby | 2016/03/11 19:45 | Harlequins v Bath | W | 35-28 |