| May 4, 2026 | Jarocka | ½–½ | O`Donnell | Round 11: Jarocka, Liwia - O`Donnell, Conor | Caro-Kann Defense: Advance Variation | |
| May 3, 2026 | Eggleston | ½–½ | O`Donnell | Round 10: Eggleston, David J - O`Donnell, Conor | Caro-Kann Defense: Advance Variation, Tal Variation | |
| May 2, 2026 | O`Donnell | 0–1 | Dicen | Round 9: O`Donnell, Conor - Dicen, Elis Denele | King's Indian Defense: Orthodox Variation | |
| Mar 8, 2026 | Petrov | 1–0 | O`Donnell | Icelandic team chess championship premier league | English Opening: Agincourt Defense | |
| Mar 7, 2026 | Laurusas | 1–0 | O`Donnell | Icelandic team chess championship premier league | Nimzo-Indian Defense: Normal Variation, Classical Defense | |
| Mar 7, 2026 | O`Donnell | 0–1 | Williams | Icelandic team chess championship premier league | Dutch Defense: Classical Variation | |
| Mar 6, 2026 | Birkisson | 1–0 | O`Donnell | Icelandic team chess championship premier league | Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation | |
| Mar 5, 2026 | O`Donnell | ½–½ | Sulypa | Icelandic team chess championship premier league | Catalan Opening: Open Defense | |
| Feb 8, 2026 | O`Donnell | 1–0 | Nelson | Round 6: O`Donnell, Conor - Nelson, Jonathan P | King's Indian Defense: Semi-Averbakh System | |
| Feb 7, 2026 | Mesropyan | 0–1 | O`Donnell | Round 5: Mesropyan, Hayk - O`Donnell, Conor | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jan 11, 2026 | Nawalaniec | ½–½ | O`Donnell | Round 4: Nawalaniec, Adam - O`Donnell, Conor | Caro-Kann Defense: Exchange Variation | |
| Jan 10, 2026 | O`Donnell | 1–0 | Maciol | Round 3: O`Donnell, Conor - Maciol, Ryszard | French Defense: Advance Variation, Lputian Variation | |
| Dec 4, 2025 | Gunnarsson | 0–1 | O`Donnell | Icelandic team chess championship premier league | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Nov 16, 2025 | O`Donnell | 0–1 | Hardaway | Icelandic team chess championship premier league | Queen's Gambit Declined: Vienna Variation, Quiet Variation | |
| Nov 15, 2025 | Bogdanov | ½–½ | O`Donnell | Icelandic team chess championship premier league | Caro-Kann Defense: Classical Variation | |
| Nov 15, 2025 | O`Donnell | 0–1 | Hjartarson | Icelandic team chess championship premier league | Nimzo-Indian Defense: Classical Variation, Berlin Variation | |
| Nov 14, 2025 | O`Donnell | ½–½ | Jacobsen | Icelandic team chess championship premier league | Queen's Gambit Declined: Janowski Variation | |
| Jun 13, 2025 | Badacsonyi | ½–½ | O`Donnell | Round 10: Badacsonyi, Frankie - O`Donnell, Conor | Queen's Gambit Declined: Modern Variation | |
| Jun 12, 2025 | Blokhin | 1–0 | O`Donnell | Round 8: Blokhin, Sofia - O`Donnell, Conor | Caro-Kann Defense: Panov Attack, Main Line | |
| Jun 12, 2025 | O`Donnell | ½–½ | Rushbrooke | Round 7: O`Donnell, Conor - Rushbrooke, Remy | Slav Defense: Quiet Variation, Pin Defense | |
| Jun 11, 2025 | O`Donnell | 1–0 | Longson | 2025 FIDE World Rapid Team Championship matches 19-26 | Semi-Slav Defense: Quiet Variation | |
| Jun 11, 2025 | O`Donnell | ½–½ | Mamedov | 2025 FIDE World Rapid Team Championschip matches 11-18 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 5, 2025 | O`Donnell | ½–½ | Pert | Round 11: O`Donnell, Conor - Pert, Richard G | Catalan Opening: Closed | |
| May 4, 2025 | O`Donnell | 1–0 | Morea | Round 10: O`Donnell, Conor - Morea, Georgiana-Steluta | King's Indian Defense: Semi-Averbakh System | |
| May 3, 2025 | Li | 0–1 | O`Donnell | Round 9: Li, Harry - O`Donnell, Conor | Caro-Kann Defense: Advance Variation, Short Variation | |
| Apr 6, 2025 | O`Donnell | ½–½ | Sowray | Round 8: O`Donnell, Conor - Sowray, Peter J | Modern Defense: Pseudo-Austrian Attack | |
| Apr 5, 2025 | Mirzoeva | ½–½ | O`Donnell | Round 7: Mirzoeva, Elmira - O`Donnell, Conor | Zukertort Opening | |
| Jan 26, 2025 | Grieve | 1–0 | O`Donnell | Round 4: Grieve, Harry - O`Donnell, Conor | Petrov's Defense: Modern Attack | |
| Jan 25, 2025 | O`Donnell | 1–0 | Maycock Bates | Round 3: O`Donnell, Conor - Maycock Bates, David Henry | English Opening: Neo-Catalan | |
| May 6, 2024 | O`Donnell | ½–½ | Murawski | Round 11: O`Donnell, Conor - Murawski, Jan | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 5, 2024 | Kirk | 1–0 | O`Donnell | Round 10: Kirk, Ezra - O`Donnell, Conor | Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line | |
| May 4, 2024 | Roberson | ½–½ | O`Donnell | Round 9: Roberson, Peter T - O`Donnell, Conor | Petrov's Defense: Modern Attack, Center Variation | |
| Mar 17, 2024 | O`Donnell | ½–½ | Maciol | Round 8: O`Donnell, Conor - Maciol, Ryszard | English Opening: King's English Variation | |
| Mar 16, 2024 | Willmoth | 0–1 | O`Donnell | Round 7: Willmoth, Robert F - O`Donnell, Conor | Zukertort Opening: Sicilian Invitation | |
| Nov 30, 2024 | O`Donnell | 0–1 | Barnaure | Round 2: O`Donnell, Conor - Barnaure, Vlad-Victor | Catalan Opening | |
| Nov 30, 2024 | Hill | 1–0 | O`Donnell | Round 3: Hill, Alistair - O`Donnell, Conor | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Nov 29, 2024 | Murawski | 0–1 | O`Donnell | Round 1: Murawski, Jan - O`Donnell, Conor | Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line | |
| Nov 24, 2024 | Swanson | 0–1 | O`Donnell | Round 2: Swanson, Stephen - O`Donnell, Conor | Caro-Kann Defense: Exchange Variation | |
| Nov 23, 2024 | O`Donnell | ½–½ | Jackson | Round 1: O`Donnell, Conor - Jackson, James P | King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System | |
| Nov 12, 2023 | O'Donnell | 1–0 | Swanson | 4NCL Division 1 2023-2024 | Queen's Pawn Game | |
| Nov 11, 2023 | Arakhamia-Grant | 1–0 | O'Donnell | 4NCL Division 1 2023-2024 | French Defense: Advance Variation, Euwe Variation | |
| Mar 19, 2023 | O'Donnell | 0–1 | Ledger | 4NCL Division 1 2022-2023 | Vienna Game: Falkbeer Variation | |
| Mar 18, 2023 | Shaw | 0–1 | O'Donnell | 4NCL Division 1 2022-2023 | Queen's Gambit Declined: Modern Variation | |
| Jan 15, 2023 | Moreby | ½–½ | O'Donnell | 4NCL Division 1 2022-2023 | Queen's Pawn Game: London System | |
| Jan 14, 2023 | Csonka | ½–½ | O'Donnell | 4NCL Division 1 2022-2023 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jun 26, 2022 | Zulfic | ½–½ | O'Donnell | 4NCL Main League 1-2 | Dutch Defense | |
| Jun 25, 2022 | O'Donnell | 0–1 | Dong | 4NCL Main League 1-2 | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| May 2, 2022 | O'Donnell | ½–½ | Kilpatrick | 4NCL Main League 1-2 | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| May 1, 2022 | O'Donnell | 0–1 | Czopor | 4NCL Main League 1-2 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 30, 2022 | O'Donnell | ½–½ | Ratnesan | 4NCL Main League 1-2 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Mar 26, 2022 | Gormally | ½–½ | O'Donnell | 4NCL Main League 1-2 | Queen's Gambit Accepted: Bogoljubow Defense | |
| Feb 13, 2022 | O'Donnell | 1–0 | Willmoth | 4NCL Main League 1-2 | Pirc Defense: Austrian Attack, Dragon Formation | |
| Feb 12, 2022 | Griffiths | 0–1 | O'Donnell | 4NCL Main League 1-2 | English Opening: King's English Variation | |
| Nov 28, 2021 | O'Donnell | ½–½ | Kolbus | 4NCL Division 1_2 | English Opening: Caro-Kann Defensive System | |
| Nov 27, 2021 | Agrawal | 0–1 | O'Donnell | 4NCL Division 1_2 | Semi-Slav Defense: Noteboom Variation | |
| — | O`Donnell | 1–0 | Terbe | 4NCL Division 1 2023-2024 | Semi-Slav Defense: Accelerated Meran Variation | |
| — | O`Donnell | 1–0 | Bjornsson | Icelandic Team Championship | Catalan Opening: Closed | |
| — | O`Donnell | ½–½ | Sverrisson | Icelandic Team Championship | Catalan Opening: Open Defense | |
| — | O`Donnell | 0–1 | Johannesson | Icelandic Team Championship | Queen's Gambit Declined: Westphalian Variation | |
| — | Kristinsson | ½–½ | O`Donnell | Icelandic Team Championship | Queen's Pawn Game: Symmetrical Variation | |
| — | Einarsson | 0–1 | O`Donnell | Icelandic Team Championship | Semi-Slav Defense: Noteboom Variation | |
