| May 4, 2026 | Larkin | 1–0 | Fitzsimons | Round 11: Larkin, Vladyslav - Fitzsimons, David | King's Indian Attack, with e6 | |
| May 3, 2026 | Fitzsimons | 0–1 | Boswell | Round 10: Fitzsimons, David - Boswell, Jacob Connor | Sicilian Defense: Katalimov Variation | |
| May 2, 2026 | Fava | 1–0 | Fitzsimons | Round 9: Fava, Lorenzo - Fitzsimons, David | Queen's Pawn Game: Accelerated London System | |
| Feb 22, 2026 | Fitzsimons | 1–0 | Melaugh | Round 5: Fitzsimons, David - Melaugh, Shane | Sicilian Defense: French Variation | |
| Feb 22, 2026 | ORourke | 0–1 | Fitzsimons | Round 4: ORourke, Emmet - Fitzsimons, David | French Defense: Tarrasch Variation, Open System | |
| Feb 22, 2026 | Sidney | ½–½ | Fitzsimons | Round 3: Sidney, Will - Fitzsimons, David | Alekhine Defense: Exchange Variation | |
| Feb 8, 2026 | Ledger | 0–1 | Fitzsimons | Round 6: Ledger, Dave J - Fitzsimons, David | Alekhine Defense: Modern Variation, Alburt Variation | |
| Feb 7, 2026 | Fitzsimons | 1–0 | Murawski | Round 5: Fitzsimons, David - Murawski, Jan | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| Jul 31, 2025 | Fitzsimons | 1–0 | Toledo | Granada Chess Open 25 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jul 31, 2025 | Fiorito | 1–0 | Fitzsimons | Granada Chess Open 25 | Rubinstein Opening | |
| May 5, 2025 | Pert | 1–0 | Fitzsimons | Round 11: Pert, Nina - Fitzsimons, David | Modern Defense: Geller's System | |
| May 4, 2025 | Milson | 0–1 | Fitzsimons | Round 10: Milson, Samuel A - Fitzsimons, David | Sicilian Defense: Closed, Traditional | |
| May 3, 2025 | Fitzsimons | 0–1 | Wall | Round 9: Fitzsimons, David - Wall, Gavin | Philidor Defense: Exchange Variation | |
| Apr 21, 2025 | Fitzsimons | 1–0 | Bezuidenhout | Round 9: Fitzsimons, David - Bezuidenhout, Roland | Pirc Defense | |
| Apr 20, 2025 | Kalavannan | 1–0 | Fitzsimons | Round 7: Kalavannan, Koby - Fitzsimons, David | English Opening: Neo-Catalan | |
| Apr 20, 2025 | O`Gorman | ½–½ | Fitzsimons | Round 8: O`Gorman, Tom - Fitzsimons, David | Rapport-Jobava System | |
| Apr 19, 2025 | Fitzsimons | ½–½ | Ruzhansky | Round 6: Fitzsimons, David - Ruzhansky, Elias | Sicilian Defense: Moscow Variation, Main Line | |
| Apr 19, 2025 | Hobson | 1–0 | Fitzsimons | Round 5: Hobson, Kenneth - Fitzsimons, David | French Defense: Burn Variation | |
| Apr 18, 2025 | Fitzsimons | 1–0 | Shearsby | Round 4: Fitzsimons, David - Shearsby, Jude | Sicilian Defense: Moscow Variation | |
| Apr 18, 2025 | Zwardon | 0–1 | Fitzsimons | Round 3: Zwardon, Vojtech - Fitzsimons, David | English Opening: Agincourt Defense | |
| Apr 17, 2025 | Fitzsimons | 0–1 | Li | Round 2: Fitzsimons, David - Li, Wenxiang | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Apr 17, 2025 | Badacsonyi | ½–½ | Fitzsimons | Round 1: Badacsonyi, Frankie - Fitzsimons, David | Bogo-Indian Defense: Exchange Variation | |
| Apr 6, 2025 | Tayar | 0–1 | Fitzsimons | Round 8: Tayar, Jonathan - Fitzsimons, David | French Defense: Exchange Variation, Svenonius Variation | |
| Apr 5, 2025 | Villiers | 0–1 | Fitzsimons | Round 7: Villiers, Thomas - Fitzsimons, David | French Defense: Burn Variation | |
| Feb 16, 2025 | Hryshchenko | 0–1 | Fitzsimons | Round 6: Hryshchenko, Kamila - Fitzsimons, David | Sicilian Defense | |
| Feb 15, 2025 | Fitzsimons | ½–½ | Varney | Round 5: Fitzsimons, David - Varney, Zoe | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Feb 2, 2025 | Fitzsimons | 1–0 | Quinn | The Sligo Tournament 2025 - Masters | Sicilian Defense: Old Sicilian | |
| Feb 2, 2025 | Gajcin | ½–½ | Fitzsimons | The Sligo Tournament 2025 - Masters | Alekhine Defense: Modern Variation, Larsen Variation | |
| Feb 1, 2025 | Fitzsimons | 1–0 | Melling | The Sligo Tournament 2025 - Masters | Caro-Kann Defense: Exchange Variation | |
| Feb 1, 2025 | Gajcin | 0–1 | Fitzsimons | The Sligo Tournament 2025 - Masters | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Jan 31, 2025 | Fitzsimons | ½–½ | O`reilly | The Sligo Tournament 2025 - Masters | Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6 | |
| Feb 4, 2025 | Vincent Bisset | 1–0 | Fitzsimons | Round 3: Vincent Bisset - Fitzsimons, David | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Jan 26, 2025 | Fitzsimons | 0–1 | Galyas | Round 4: Fitzsimons, David - Galyas, Miklos | Caro-Kann Defense: Advance Variation | |
| Jan 25, 2025 | Bezuidenhout | 0–1 | Fitzsimons | Round 3: Bezuidenhout, Roland - Fitzsimons, David | English Opening: King's English Variation | |
| Jan 21, 2025 | Fitzsimons | 1–0 | Allidine | Round 2: Fitzsimons, David - Allidine, Mark | Italian Game: Giuoco Piano | |
| Sep 22, 2024 | Kassis | 0–1 | Fitzsimons | 45th FIDE Chess Olympiad | French Defense: Burn Variation | |
| Sep 21, 2024 | Fitzsimons | 0–1 | Starostits | 45th FIDE Chess Olympiad | Caro-Kann Defense: Panov Attack | |
| Sep 20, 2024 | Fitzsimons | 0–1 | Kostolansky | 45th FIDE Chess Olympiad | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Sep 19, 2024 | Smerdon | ½–½ | Fitzsimons | 45th FIDE Chess Olympiad | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Sep 16, 2024 | Frick | 0–1 | Fitzsimons | 45th FIDE Chess Olympiad | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Sep 14, 2024 | Fitzsimons | 0–1 | Amdouni | 45th FIDE Chess Olympiad | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Sep 13, 2024 | Fitzsimons | 1–0 | Mastrovasilis | 45th FIDE Chess Olympiad | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Sep 12, 2024 | Smirin | 1–0 | Fitzsimons | 45th FIDE Chess Olympiad | French Defense: Rubinstein Variation, Blackburne Defense | |
| Sep 11, 2024 | Maharaj | 0–1 | Fitzsimons | 45th FIDE Chess Olympiad | Sicilian Defense: Najdorf Variation | |
| Jul 21, 2024 | Fitzsimons | 0–1 | Large | Round 6: Fitzsimons, David - Large, Peter G | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 20, 2024 | Fitzsimons | 0–1 | Navrotescu | Round 4: Fitzsimons, David - Navrotescu, Andreea | French Defense: Classical Variation, Steinitz Variation | |
| Jul 19, 2024 | Rocco | * | Fitzsimons | Round 3: Rocco, Federico - Fitzsimons, David | ? | |
| Jul 18, 2024 | Fitzsimons | 0–1 | Fernandez | Round 2: Fitzsimons, David - Fernandez, Daniel Howard | Scotch Game: Modern Defense | |
| Jul 17, 2024 | Josse | 0–1 | Fitzsimons | Round 1: Josse, Mark - Fitzsimons, David | King's Indian Defense: Makogonov Variation | |
| Jul 16, 2024 | Fitzsimons | ½–½ | Fernandez | Round 9: Fitzsimons, David - Fernandez, Daniel Howard | French Defense: Winawer Variation, Alekhine-Maróczy Gambit | |
| Jul 16, 2024 | Willow | ½–½ | Fitzsimons | Round 8: Willow, Jonah B - Fitzsimons, David | French Defense: Advance Variation, Paulsen Attack | |
| Jul 15, 2024 | Fitzsimons | 0–1 | Waldhausen Gordon | Round 7: Fitzsimons, David - Waldhausen Gordon, Frederick | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Jul 15, 2024 | Haydon | ½–½ | Fitzsimons | Round 6: Haydon, David L - Fitzsimons, David | King's Indian Defense: Fianchetto Variation, Larsen Defense | |
| Jul 14, 2024 | Fitzsimons | 0–1 | Ernst | Round 5: Fitzsimons, David - Ernst, Sipke | Four Knights Game: Spanish Variation, Classical Variation | |
| Jul 13, 2024 | Turner | ½–½ | Fitzsimons | Round 4: Turner, Matthew J - Fitzsimons, David | Queen's Gambit Accepted: Gunsberg Defense | |
| Jul 13, 2024 | Fitzsimons | ½–½ | Wadsworth | Round 3: Fitzsimons, David - Wadsworth, Matthew J | Caro-Kann Defense: Tartakower Variation | |
| Jul 12, 2024 | Derakhshani | ½–½ | Fitzsimons | Round 1: Derakhshani, Borna - Fitzsimons, David | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Jul 11, 2024 | Jackson | 1–0 | Fitzsimons | Round 2: Jackson, James P - Fitzsimons, David | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Jun 3, 2024 | Fitzsimons | 1–0 | Neary | Round 6: Fitzsimons, David - Neary, Graham | Petrov's Defense: Three Knights Game | |
| Jun 3, 2024 | Scott | 0–1 | Fitzsimons | Round 5: Scott, Luke - Fitzsimons, David | Indian Defense: Normal Variation | |
| Jun 2, 2024 | Fitzsimons | 0–1 | Artemenko | Round 4: Fitzsimons, David - Artemenko, Oleg | Sicilian Defense: Closed, Traditional | |
| Jun 2, 2024 | Daly | * | Fitzsimons | Round 3: Daly, Colm - Fitzsimons, David | Zukertort Opening: Reversed Grünfeld | |
| Jun 1, 2024 | Fitzsimons | 1–0 | Wafa | Round 2: Fitzsimons, David - Wafa, Shrook | Sicilian Defense: Alapin Variation | |
| Jun 1, 2024 | Liu | 0–1 | Fitzsimons | Round 1: Liu, Jason - Fitzsimons, David | Sicilian Defense: Najdorf Variation | |
| Apr 1, 2024 | Fitzsimons | 1–0 | Daly | Round 7: Fitzsimons, David - Daly, Colm | Sicilian Defense: Delayed Alapin Variation | |
| Apr 1, 2024 | Fitzsimons | 1–0 | Melaugh | Round 6: Fitzsimons, David - Melaugh, Shane | French Defense: Tarrasch Variation | |
| Mar 31, 2024 | Jessel | ½–½ | Fitzsimons | Round 5: Jessel, Stephen - Fitzsimons, David | English Opening: Agincourt Defense, Keres Defense | |
| Mar 31, 2024 | Flynn | ½–½ | Fitzsimons | Round 4: Flynn, Jacob - Fitzsimons, David | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Mar 30, 2024 | Fitzsimons | 1–0 | Lohr | Round 3: Fitzsimons, David - Lohr, Maximilian | Sicilian Defense: Modern Variations | |
| Mar 30, 2024 | ORourke | 0–1 | Fitzsimons | Round 2: ORourke, Emmet - Fitzsimons, David | Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense | |
| Mar 29, 2024 | Fitzsimons | 1–0 | Salin | Round 1: Fitzsimons, David - Salin, Rohan | Caro-Kann Defense: Exchange Variation | |
| May 1, 2023 | Emms | ½–½ | Fitzsimons | 4NCL Division 1 2022-2023 | French Defense: Tarrasch Variation, Eliskases Variation | |
| Apr 30, 2023 | Bobras | ½–½ | Fitzsimons | 4NCL Division 1 2022-2023 | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 29, 2023 | Fitzsimons | 0–1 | Quinn | 4NCL Division 1 2022-2023 | Sicilian Defense: French Variation | |
| Apr 3, 2023 | Mons | ½–½ | Fitzsimons | Reykjavik Open 2023 | Catalan Opening: Open Defense | |
| Apr 2, 2023 | Fitzsimons | ½–½ | Fier | Reykjavik Open 2023 | Sicilian Defense: Alapin Variation | |
| Apr 1, 2023 | Fitzsimons | 1–0 | Kunz | Reykjavik Open 2023 | Caro-Kann Defense: Exchange Variation | |
| Apr 1, 2023 | Gretarsson | 0–1 | Fitzsimons | Reykjavik Open 2023 | Bird Opening: Dutch Variation | |
| Mar 31, 2023 | Doran | * | Fitzsimons | Reykjavik Open | ? | |
| Mar 19, 2023 | Arkell | ½–½ | Fitzsimons | 4NCL Division 1 2022-2023 | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Mar 18, 2023 | Fitzsimons | ½–½ | Clarke | 4NCL Division 1 2022-2023 | Sicilian Defense: Alapin Variation | |
| Mar 3, 2023 | Bacrot | 1–0 | Fitzsimons | European Championship | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Feb 12, 2023 | Fitzsimons | 1–0 | Lee | 4NCL Division 1 2022-2023 | French Defense: Advance Variation, Wade Variation | |
| Feb 11, 2023 | Venkatesan | ½–½ | Fitzsimons | 4NCL Division 1 2022-2023 | Queen's Gambit Declined: Exchange Variation | |
| Jan 15, 2023 | Fitzsimons | 1–0 | Ledger | 4NCL Division 1 2022-2023 | French Defense: Rubinstein Variation, Blackburne Defense | |
| Jan 14, 2023 | Chan | 1–0 | Fitzsimons | 4NCL Division 1 2022-2023 | Modern Defense: Three Pawns Attack | |
| Dec 13, 2022 | Fitzsimons | ½–½ | Petrosyan | Sunway Sitges | Sicilian Defense: Taimanov Variation | |
| Nov 30, 2022 | Niemann | 1–0 | Fitzsimons | III Elllobregat Open Chess | Catalan Opening: Closed | |
| Oct 23, 2022 | Fitzsimons | 1–0 | Redmond | 4NCL Division 1 2022-2023 | French Defense: Winawer Variation, Alekhine Gambit, Kan Variation | |
| Oct 22, 2022 | Stoyanov | 0–1 | Fitzsimons | 4NCL Division 1 2022-2023 | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Jun 26, 2022 | Freeman | 0–1 | Fitzsimons | 4NCL Main League 1-2 | Bogo-Indian Defense: Retreat Variation | |
| Jun 25, 2022 | Fitzsimons | 1–0 | Barrett | 4NCL Main League 1-2 | Sicilian Defense: Scheveningen Variation, Keres Attack | |
| May 2, 2022 | Golding | ½–½ | Fitzsimons | 4NCL Main League 1-2 | Sicilian Defense: Moscow Variation, Main Line | |
| May 1, 2022 | Fitzsimons | ½–½ | Tan | 4NCL Main League 1-2 | French Defense: Burn Variation | |
| Apr 30, 2022 | Skettos | 0–1 | Fitzsimons | 4NCL Main League 1-2 | Sicilian Defense: Najdorf Variation, English Attack | |
| Mar 26, 2022 | Fitzsimons | 1–0 | Ledger | 4NCL Main League 1-2 | English Opening: King's English Variation, Four Knights Variation | |
| Feb 13, 2022 | Ethelontis | 0–1 | Fitzsimons | 4NCL Main League 1-2 | English Opening: King's English Variation | |
| Feb 12, 2022 | Fitzsimons | 0–1 | Cox | 4NCL Main League 1-2 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Nov 28, 2021 | Fitzsimons | ½–½ | Cyborowski | 4NCL Division 1_2 | Caro-Kann Defense: Two Knights Attack | |
| Nov 27, 2021 | Snape | ½–½ | Fitzsimons | 4NCL Division 1_2 | Slav Defense: Alekhine Variation | |