| Year | Title | Role | Crew role | Notes | Source |
| Zillion: Burning Night | Big Odama | | | |
| Fight! Iczer-One | Teacher | | As Sparky Thornton | |
| Doomed Megalopolis | Doctor | | | |
| The Cockpit | Ensign Nogami | | | |
| Crimson Wolf | Professor Shagdol | | | |
| Street Fighter II V | Guile | | | |
| Super Pig | Milton Massen | | | |
| Black Jack | Black Jack | | | |
| Mobile Suit Gundam 0083: Stardust Memory | Anavel Gato | | As Sparky Thornton | |
| Fushigi Yūgi | Hotohori | | As Sparky Thornton | |
| Serial Experiments Lain | Masami Eiri | | | |
| Perfect Blue | Yamashiro | | As Sparky Thornton, grouped under Voice Cast | |
| Cowboy Bebop | Steve, Asimov Solensan | | | |
| 14.08.1999–2001 | Digimon: Digital Monsters | Gabumon, Mummymon, others | | Adventure/02/Tamers | |
| The Castle of Cagliostro | Count Lazare do Cagliostro | | As Sparky Thornton. In the 1992 English dub of the film, he voiced Gendarme Captain Gustav and the Archbishop. | |
| 24.04.2001 | Rurouni Kenshin | Hajime Saito | | As Sparky Thornton | |
| 24.04.2001 | Transformers: Robots in Disguise | Dr. Onishi | | | |
| 19.02.2002 | Love Hina | Seta Noriyasu | | As Ronald Allen | |
| 19.02.2002 | Digimon Frontier | Tsunomon, Gabumon, Karatenmon | | | |
| 19.02.2002 | Gundress | | ADR director | | |
| 19.02.2002 | Cosmo Warrior Zero | | ADR director | | |
| 19.02.2002 | Ys | Ruta Gemma, Kaita | | Credited as Ron Allen and Sparky Thornton | |
| 06.06.2003 | Ys II: Castle in the Heavens | Darm, Ruta Gemma | | Credited as Ron Allen | |
| 06.06.2003 | s-CRY-ed | | ADR director | | |
| 06.06.2003 | Heat Guy J | Ken Edmundo | | | |
| 27.02.2004 | Duel Masters | Black Knight | | | |
| 27.02.2004 | Wolf's Rain | Leara's father | | | |
| 27.02.2004 | Gad Guard | | ADR director | | |
| 27.02.2004 | Gungrave | Brandon Heat / Beyond the Grave | | As Ron Allen | |
| 27.02.2004 | Tsukihime | | ADR director | | |
| 27.02.2004 | Mobile Suit Gundam F91 | Sam Ehrug | | | |
| 27.02.2004 | Sky Blue | Cade | | | |
| 15.03.2005 | Otogi Zoshi | | ADR director | | |
| 15.03.2005 | Planetes | Hachirota | | | |
| 15.03.2005 | Mars Daybreak | | ADR director | | |
| 15.03.2005 | IGPX | Mark | | TV series | |
| 15.03.2005 | Ghost in the Shell: Stand Alone Complex 2nd GIG | Kuze | | | |
| 2005–06 | Samurai Champloo | Jin | | Grouped under English Voice Cast | |
| 2005–09 | Naruto | Kisame Hoshigaki, Tazuna, others | ADR director | | |
| 15.04.2006 | Eureka Seven | Matthieu | | | |
| 15.04.2006 | Kannazuki no Miko | Girochi | Voice Director | | |
| 15.04.2006 | Bobobo-bo Bo-bobo | Don Patch | | | |
| 15.04.2006 | Fate/stay night | Kiritsugu Emiya | | | |
| 08.09.2006–13 | Bleach | Narrator, Zennosuke Kurumadni, others | ADR director, ADR script | | |
| Digimon Data Squad | Homer Yushima | | | |
| Afro Samurai | Various | | | |
| 28.03.2008 | Blue Dragon | Minotaur | ADR director | | |
| 28.03.2008 | Code Geass | Kaname Ohgi | | | |
| 28.03.2008 | Strait Jacket | George Thomson | | | |
| 12.10.2009 | Monster | The Baby, others | | | |
| 04.12.2009–13 | Stitch! | Hämsterviel, Suzuki, others | | | |
| 28.10.2009–18 | Naruto: Shippuden | Kisame Hoshigaki, Fukasaku, Shukaku, others | | | |
| 2012–14 | Monsuno | Beyal | | | |
| 18.09.2012 | Persona 4: The Animation | Kinshiro Morooka | | | |
| 18.09.2012 | The Testament of Sister New Devil | Jin Toujou | | | |
| 02.10.2012–present | Blue Exorcist | Shiro Fujimoto, Satan, Ukemochi | | | |
| 07.08.2013 | B-Daman Crossfire | Goichiro Tsukinowa / Grizz Sukino | | | |
| 07.08.2013 | K | Daikaku Kokujoji, Yujiro Benzai, Saburota Bandom, Prime Minister, Yo Chitose | | | |
| 07.09.2013–15 | Digimon Fusion | Tactimon, AxeKnightmon, Leviamon, Kabukimon, others | | | |
| 13.08.2013–present | Sword Art Online | Klein/Ryōtarō Tsuboi | | 3 TV seasons and a movie | |
| 13.08.2013–present | The Jungle Bunch | Maurice | | | |
| 02.09.2014 | Blood Lad | | ADR director | | |
| 2014–19 | Sailor Moon | Sakiko's Father, Takao, Katsutoshi Yamada, Dr. Gia/Sailor Doctor, Jotaro Kiriyama/Sailor Antique | | Viz Media dub | |
| 03.02.2015 | Coppelion | Mitsuo Kawabata | | | |
| 03.02.2015 | Mobile Suit Gundam: The Origin | Ramba Ral | | | |
| 03.02.2015 | Durarara!!×2 | | ADR director | Directed the first part called Shō with Patrick Seitz | |
| 03.02.2015 | BlazBlue Alter Memory | Jubei | | | |
| 21.07.2015–16 | Aldnoah.Zero | Saazbaum | | | |
| 16.07.2016 | One-Punch Man | Snek, Sitch, Fukegao, and Frog-Man | | | |
| 16.07.2016 | March Comes In like a Lion | Kai Shimada | | | |
| 2017 | Hunter x Hunter | Dalzollene | | 2011 series | |
| 2017 | Anohana: The Flower We Saw That Day | Atsushi Yadomi | | | |
| 2018 | The Seven Deadly Sins | Galand | | | |
| 31.10.2018–2020 | Baki | Yujiro | | Netflix | |
| 2019–present | Demon Slayer: Kimetsu no Yaiba | Hand Demon, Tanjuro Kamado | | | |
| 2020–21 | Boruto: Naruto Next Generations | Shukaku | | | |
| 28.02.2020 | Marvel Future Avengers | Arnim Zola, Scragg, Councilman Reiner, Narrator | | | |
| 28.02.2020 | Drifting Dragons | Ura | | | |
| 28.02.2020 | Dorohedoro | Narrator | | | |
| 28.02.2020 | Great Pretender | Seiji Ozaki | | | |
| 2021 | Kuroko's Basketball | Masaaki Nakatani | | | |
| 2021 | Case Closed: The Fist of Blue Sapphire | Inspector Ginzo Nakamori | | | |
| 2021–23 | Vinland Saga | Askeladd | | Netflix dub | |
| 2021 | The Faraway Paladin | Gus | | | |
| 2022 | Vampire in the Garden | Largo | | | |
| 2022 | Fate/Grand Carnival | James Moriarty | | | |
| 2022 | Cyberpunk: Edgerunners | Jimmy Kurosaki | | | |
| 2022–present | Bleach: Thousand-Year Blood War | Zennosuke Kurumadni, Rojuro Ohtoribashi, Hiyosu | | | |
| 2023 | The Legend of Heroes: Trails of Cold Steel – Northern War | Bleublanc | | | |
| 2023 | Junji Ito Maniac: Japanese Tales of the Macabre | Tagaisu, Rogi, Additional Voices | | | |
| 2023 | Mashle: Magic and Muscles | Regro Burnedead | | | |
| 2023–24 | Jujutsu Kaisen | Atsuya Kusakabe, Narrator | | | |
| 2023 | Pluto | Schelling, The Doctor | | | |
| 2023 | Onimusha | Matsuki Kensuke | | | |
| 2023 | Akuma-kun | Saito | | | |
| 2024 | Mission: Yozakura Family | Ban Yozakura | | | |
| 2024 | Dandadan | Juichi Kito | | | |
| 2025 | Sakamoto Days | Pizza Nakajima, Yutaro's Father | | | |