When Armstrong was attending University of Limerick he played the 2010-11 All-Ireland League rugby season for Shannon.
Cardiff RFC | Oxford University RFC | River Shannon | Newport RFC | Shannon | Molly Shannon | Swansea RFC | Llanelli RFC | Claude Shannon | Sharon Shannon | Shannon Tweed | Shannon Noll | Pontypridd RFC | Glasgow Academicals RFC | Del Shannon | Shannon River | Shannon McNally | Shannon Elizabeth | Shannon Briggs | Shannon Airport | Pontypool RFC | London Welsh RFC | St. Peters RFC | St. George’s Hospital Medical School RFC | Shannon Ryan | Shannon Moore | Scott Shannon | Hawick RFC | Elizabeth Killigrew, Viscountess Shannon | Aberavon RFC |