Face à face
| Premiership Rugby Shield, Southern Conference | 2017/09/11 18:30 | L. Irish v Harlequins | W | 7-45 |
| Premiership Rugby Shield, Southern Conference | 2015/12/28 15:00 | Harlequins v L. Irish | W | 34-7 |
| Premiership Rugby Shield, Southern Conference | 2014/12/15 19:30 | L. Irish v Harlequins | W | 7-12 |
Home History
| Rugby - Premiership | 2019/12/21 15:00 | Wasps v Harlequins | W | 22-28 |
| Coupe d'Europe de rugby | 2019/12/13 19:45 | Harlequins v Ulster | L | 10-34 |
| Coupe d'Europe de rugby | 2019/12/07 15:15 | Ulster v Harlequins | L | 25-24 |
| Rugby - Premiership | 2019/12/01 15:00 | Harlequins v Gloucester | W | 23-19 |
| Premiership Rugby Shield, Southern Conference | 2019/11/25 19:30 | Braves v Harlequins | L | 45-0 |
| Coupe d'Europe de rugby | 2019/11/23 17:30 | Harlequins v Bath | W | 15-9 |
| Coupe d'Europe de rugby | 2019/11/16 17:30 | Clermont v Harlequins | L | 53-21 |
| Rugby - Premiership | 2019/11/09 15:00 | Harlequins v Worcester Warriors | L | 14-19 |
Away History
| Premiership Rugby Shield, Southern Conference | 2019/12/16 19:00 | L. Irish v Storm | L | 15-33 |
| Premiership Rugby Shield, Southern Conference | 2019/11/25 19:00 | L. Irish v Bristol RC Bears Reserve | W | 31-15 |
| Premiership Rugby Shield, Northern Conference | 2018/04/16 18:15 | Bristol RC Bears Reserve v L. Irish | W | 19-33 |
| Premiership Rugby Shield, Northern Conference | 2018/04/09 18:30 | L. Irish v Bristol RC Bears Reserve | W | 62-5 |
| Premiership Rugby Shield, Southern Conference | 2017/11/27 19:30 | Bath v L. Irish | W | 7-64 |
| Premiership Rugby Shield, Southern Conference | 2017/10/02 18:30 | Braves v L. Irish | L | 47-12 |
| Premiership Rugby Shield, Southern Conference | 2017/09/22 18:15 | Bristol RC Bears Reserve v L. Irish | L | 27-17 |
| Premiership Rugby Shield, Southern Conference | 2017/09/11 18:30 | L. Irish v Harlequins | L | 7-45 |