The fastest knockout in UFC lightweight history is Matt Frevola vs Terrance McKinney, at 7 seconds, at UFC 263: Adesanya vs. Vettori 2 on 12 June 2021.
| # | Time | Bout | Result | Ended | Date | Event |
|---|---|---|---|---|---|---|
| 1 | 0:07 | Matt Frevola vs Terrance McKinney | Terrance McKinney · KO/TKO | R1 0:07 | 2021-06-12 | UFC 263: Adesanya vs. Vettori 2 |
| 2 | 0:09 | Gray Maynard vs Joe Veres | Gray Maynard · KO/TKO | R1 0:09 | 2007-09-19 | UFC Fight Night: Thomas vs Florian |
| 3 | 0:11 | BJ Penn vs Caol Uno | BJ Penn · KO/TKO | R1 0:11 | 2001-11-02 | UFC 34: High Voltage |
| 4 | 0:12 | Rob Emerson vs Manvel Gamburyan | Rob Emerson · KO/TKO | R1 0:12 | 2008-08-09 | UFC 87: Seek And Destroy |
| 5 | 0:15 | Jens Pulver vs John Lewis | Jens Pulver · KO/TKO | R1 0:15 | 2000-11-17 | UFC 28: High Stakes |
| 6 | 0:16 | Beneil Dariush vs Benoit Saint Denis | Benoit Saint Denis · KO/TKO | R1 0:16 | 2025-11-15 | UFC 322: Della Maddalena vs. Makhachev |
| 7 | 0:19 | Roger Huerta vs John Halverson | Roger Huerta · KO/TKO | R1 0:19 | 2007-02-03 | UFC 67: All or Nothing |
| 8 | 0:19 | Quillan Salkilld vs Anshul Jubli | Quillan Salkilld · KO/TKO | R1 0:19 | 2025-02-08 | UFC 312: Du Plessis vs. Strickland 2 |
| 9 | 0:20 | Terrance McKinney vs Brendon Marotte | Terrance McKinney · KO/TKO | R1 0:20 | 2023-10-14 | UFC Fight Night: Yusuff vs. Barboza |
| 10 | 0:21 | Gregor Gillespie vs Andrew Holbrook | Gregor Gillespie · KO/TKO | R1 0:21 | 2017-04-08 | UFC 210: Cormier vs. Johnson 2 |
| 11 | 0:22 | Matt Wiman vs Jordan Leavitt | Jordan Leavitt · KO/TKO | R1 0:22 | 2020-12-05 | UFC Fight Night: Hermansson vs. Vettori |
| 12 | 0:23 | Jim Miller vs Jesse Butler | Jim Miller · KO/TKO | R1 0:23 | 2023-06-03 | UFC Fight Night: Kara-France vs. Albazi |
| 13 | 0:24 | Terrance McKinney vs Kyle Nelsongraded call | Terrance McKinney · KO/TKO | R1 0:24 | 2026-03-28 | UFC Fight Night: Adesanya vs. Pyfer |
| 14 | 0:30 | Marc Diakiese vs Teemu Packalen | Marc Diakiese · KO/TKO | R1 0:30 | 2017-03-18 | UFC Fight Night: Manuwa vs. Anderson |
| 15 | 0:31 | Tito Ortiz vs Wes Albritton | Tito Ortiz · KO/TKO | R1 0:31 | 1997-05-30 | UFC 13: The Ultimate Force |
| 16 | 0:33 | Grant Dawson vs King Green | King Green · KO/TKO | R1 0:33 | 2023-10-07 | UFC Fight Night: Dawson vs. Green |
| 17 | 0:34 | Joaquim Silva vs Andrew Holbrook | Joaquim Silva · KO/TKO | R1 0:34 | 2016-07-08 | The Ultimate Fighter: Team Joanna vs. Team Cláudia Finale |
| 18 | 0:36 | Melvin Guillard vs Dennis Siver | Melvin Guillard · KO/TKO | R1 0:36 | 2008-07-05 | UFC 86: Jackson vs Griffin |
| 19 | 0:37 | Joaquim Silva vs Ricky Glenn | Ricky Glenn · KO/TKO | R1 0:37 | 2021-06-19 | — |
| 20 | 0:37 | Terrance McKinney vs Esteban Ribovics | Esteban Ribovics · KO/TKO | R1 0:37 | 2024-05-11 | UFC Fight Night: Lewis vs. Nascimento |
| 21 | 0:39 | Jalin Turner vs Kaue Fernandesgraded call | Jalin Turner · KO/TKO | R1 0:39 | 2026-08-15 | UFC 330: Makhachev vs. Machado Garry |
| 22 | 0:41 | Frank Camacho vs Justin Jaynes | Justin Jaynes · KO/TKO | R1 0:41 | 2020-06-20 | UFC Fight Night: Blaydes vs. Volkov |
| 23 | 0:42 | Beneil Dariush vs Alexander Hernandez | Alexander Hernandez · KO/TKO | R1 0:42 | 2018-03-03 | UFC 222: Cyborg vs. Kunitskaya |
| 24 | 0:44 | Shane Nelson vs Aaron Riley | Shane Nelson · KO/TKO | R1 0:44 | 2009-03-07 | UFC 96: Jackson vs Jardine |
| 25 | 0:44 | Duane Ludwig vs Darren Elkins | Darren Elkins · KO/TKO | R1 0:44 | 2010-03-21 | UFC Live: Vera vs Jones |
| 26 | 0:46 | Devonte Smith vs Julian Erosa | Devonte Smith · KO/TKO | R1 0:46 | 2018-11-10 | UFC Fight Night: Korean Zombie vs. Rodriguez |
| 27 | 0:46 | Jamie Mullarkey vs Khama Worthy | Jamie Mullarkey · KO/TKO | R1 0:46 | 2021-03-27 | UFC 260: Miocic vs. Ngannou |
| 28 | 0:48 | Joe Lauzon vs Jens Pulver | Joe Lauzon · KO/TKO | R1 0:48 | 2006-09-23 | UFC 63: Hughes vs Penn |
| 29 | 0:53 | Evan Dunham vs Olivier Aubin-Mercier | Olivier Aubin-Mercier · KO/TKO | R1 0:53 | 2018-04-07 | UFC 223: Khabib vs. Iaquinta |
| 30 | 0:53 | Callan Potter vs Jalin Turner | Jalin Turner · KO/TKO | R1 0:53 | 2019-02-09 | UFC 234: Adesanya vs. Silva |
| 31 | 0:54 | Sam Stout vs Frankie Perez | Frankie Perez · KO/TKO | R1 0:54 | 2015-08-23 | UFC Fight Night: Holloway vs Oliveira |
| 32 | 0:57 | Francisco Trevino vs Sage Northcutt | Sage Northcutt · KO/TKO | R1 0:57 | 2015-10-03 | UFC 192: Cormier vs Gustafsson |
| 33 | 0:57 | Islam Makhachev vs Gleison Tibau | Islam Makhachev · KO/TKO | R1 0:57 | 2018-01-20 | UFC 220: Miocic vs. Ngannou |
| 34 | 0:59 | George Sotiropoulos vs Rafael Dos Anjos | Rafael Dos Anjos · KO/TKO | R1 0:59 | 2011-07-02 | UFC 132: Cruz vs Faber |
| 35 | 1:00 | Matt Frevola vs Marco Polo Reyes | Marco Polo Reyes · KO/TKO | R1 1:00 | 2018-01-14 | UFC Fight Night: Stephens vs. Choi |
| 36 | 1:01 | Mairbek Taisumov vs Marcin Bandel | Mairbek Taisumov · KO/TKO | R1 1:01 | 2014-10-04 | — |
| 37 | 1:03 | Kyle Bradley vs Phillipe Nover | Kyle Bradley · KO/TKO | R1 1:03 | 2009-05-23 | UFC 98: Evans vs Machida |
| 38 | 1:03 | Nikolas Motta vs Tom Nolan | Nikolas Motta · KO/TKO | R1 1:03 | 2024-01-13 | UFC Fight Night: Ankalaev vs. Walker 2 |
| 39 | 1:04 | Tyson Griffin vs Takanori Gomi | Takanori Gomi · KO/TKO | R1 1:04 | 2010-08-01 | UFC Live: Jones vs Matyushenko |
| 40 | 1:04 | Beneil Dariush vs Arman Tsarukyan | Arman Tsarukyan · KO/TKO | R1 1:04 | 2023-12-02 | UFC Fight Night: Dariush vs. Tsarukyan |
| 41 | 1:06 | Tim Means vs Justin Salas | Tim Means · KO/TKO | R1 1:06 | 2012-06-08 | UFC on FX: Johnson vs McCall |
| 42 | 1:06 | Rafael Dos Anjos vs Donald Cerronetitle | Rafael Dos Anjos · KO/TKO | R1 1:06 | 2015-12-19 | UFC on FOX: Dos Anjos vs. Cowboy 2 |
| 43 | 1:07 | Joe Lauzon vs Clay Guida | Clay Guida · KO/TKO | R1 1:07 | 2017-11-11 | UFC Fight Night: Poirier vs. Pettis |
| 44 | 1:07 | Drew Dober vs Marco Polo Reyes | Drew Dober · KO/TKO | R1 1:07 | 2019-06-29 | UFC Fight Night: Ngannou vs. Dos Santos |
| 45 | 1:10 | Cole Miller vs Andy Wang | Cole Miller · KO/TKO | R1 1:10 | 2007-06-23 | The Ultimate Fighter: Team Pulver vs. Team Penn Finale |
| 46 | 1:10 | Drew Dober vs Nasrat Haqparast | Drew Dober · KO/TKO | R1 1:10 | 2020-01-18 | UFC 246: McGregor vs. Cowboy |
| 47 | 1:12 | Mark Madsen vs Danilo Belluardo | Mark Madsen · KO/TKO | R1 1:12 | 2019-09-28 | UFC Fight Night: Hermansson vs. Cannonier |
| 48 | 1:12 | Luigi Vendramini vs Jessin Ayari | Luigi Vendramini · KO/TKO | R1 1:12 | 2020-10-03 | UFC Fight Night: Holm vs. Aldana |
| 49 | 1:13 | Shane Campbell vs Felipe Silva | Felipe Silva · KO/TKO | R1 1:13 | 2016-08-27 | UFC on FOX: Maia vs. Condit |
| 50 | 1:14 | Maheshate vs Steve Garcia | Maheshate · KO/TKO | R1 1:14 | 2022-06-11 | UFC 275: Teixeira vs. Prochazka |
| 51 | 1:15 | Sam Patterson vs Yanal Ashmouz | Yanal Ashmouz · KO/TKO | R1 1:15 | 2023-03-18 | UFC 286: Edwards vs. Usman 3 |
| 52 | 1:16 | Donald Cerrone vs Melvin Guillard | Donald Cerrone · KO/TKO | R1 1:16 | 2012-08-11 | UFC 150: Henderson vs Edgar II |
| 53 | 1:19 | Yves Edwards vs Joao Pierini | Yves Edwards · KO/TKO | R1 1:19 | 2002-06-22 | UFC 37.5: As Real As It Gets |
| 54 | 1:20 | Alexander Hernandez vs Mike Breeden | Alexander Hernandez · KO/TKO | R1 1:20 | 2021-10-02 | — |
| 55 | 1:21 | Anthony Pettis vs Joe Lauzon | Anthony Pettis · KO/TKO | R1 1:21 | 2012-02-25 | UFC 144: Edgar vs Henderson |
| 56 | 1:23 | Jack Nilson vs Saeed Hosseini | Jack Nilson · KO/TKO | R1 1:23 | 1997-05-30 | UFC 13: The Ultimate Force |
| 57 | 1:23 | Marcelo Mello vs David Roberts | Marcelo Mello · KO/TKO | R1 1:23 | 1999-05-07 | UFC 20: Battle for the Gold |
| 58 | 1:24 | Rafaello Oliveira vs Erik Koch | Erik Koch · KO/TKO | R1 1:24 | 2014-02-22 | UFC 170: Rousey vs McMann |
| 59 | 1:24 | Mairbek Taisumov vs Felipe Silva | Mairbek Taisumov · KO/TKO | R1 1:24 | 2017-09-02 | UFC Fight Night: Volkov vs. Struve |
| 60 | 1:25 | Terrance McKinney vs Mike Breeden | Terrance McKinney · KO/TKO | R1 1:25 | 2023-08-12 | UFC Fight Night: Luque vs. Dos Anjos |
| 61 | 1:26 | Diego Sanchez vs Joe Lauzon | Joe Lauzon · KO/TKO | R1 1:26 | 2016-07-09 | UFC 200: Tate vs Nunes |
| 62 | 1:26 | Magomed Mustafaev vs Rafael Fiziev | Magomed Mustafaev · KO/TKO | R1 1:26 | 2019-04-20 | UFC Fight Night: Overeem vs. Oleinik |
| 63 | 1:26 | Charles Oliveira vs Jared Gordon | Charles Oliveira · KO/TKO | R1 1:26 | 2019-11-16 | UFC Fight Night: Blachowicz vs. Jacare |
| 64 | 1:27 | Kevin Jackson vs Todd Butler | Kevin Jackson · KO/TKO | R1 1:27 | 1997-07-27 | UFC 14: Showdown |
| 65 | 1:27 | Justin Gaethje vs James Vick | Justin Gaethje · KO/TKO | R1 1:27 | 2018-08-25 | UFC Fight Night: Gaethje vs. Vick |
| 66 | 1:30 | Takanori Gomi vs Dong Hyun Ma | Dong Hyun Ma · KO/TKO | R1 1:30 | 2017-09-22 | UFC Fight Night: Saint Preux vs. Okami |
| 67 | 1:31 | Matt Frevola vs Benoit Saint Denis | Benoit Saint Denis · KO/TKO | R1 1:31 | 2023-11-11 | UFC 295: Prochazka vs. Pereira |
| 68 | 1:31 | Nazim Sadykhov vs Matheus Camilograded call | Matheus Camilo · KO/TKO | R1 1:31 | 2026-06-27 | UFC Fight Night: Fiziev vs. Torres |
| 69 | 1:32 | Myles Jury vs Takanori Gomi | Myles Jury · KO/TKO | R1 1:32 | 2014-09-20 | UFC Fight Night: Hunt vs Nelson |
| 70 | 1:33 | Joe Lauzon vs Jonathan Pearce | Joe Lauzon · KO/TKO | R1 1:33 | 2019-10-18 | UFC Fight Night: Reyes vs. Weidman |
| 71 | 1:33 | Ottman Azaitar vs Khama Worthy | Ottman Azaitar · KO/TKO | R1 1:33 | 2020-09-12 | UFC Fight Night: Waterson vs. Hill |
| 72 | 1:35 | Dustin Poirier vs Michael Johnson | Michael Johnson · KO/TKO | R1 1:35 | 2016-09-17 | UFC Fight Night: Poirier vs. Johnson |
| 73 | 1:35 | Ricky Glenn vs Christos Giagos | Christos Giagos · KO/TKO | R1 1:35 | 2023-04-22 | UFC Fight Night: Pavlovich vs. Blaydes |
| 74 | 1:36 | Chad Laprise vs Thibault Gouti | Chad Laprise · KO/TKO | R1 1:36 | 2016-08-27 | UFC on FOX: Maia vs. Condit |
| 75 | 1:37 | Melvin Guillard vs Rick Davis | Melvin Guillard · KO/TKO | R1 1:37 | 2006-05-27 | UFC 60: Hughes vs Gracie |
| 76 | 1:38 | Al Iaquinta vs Diego Sanchez | Al Iaquinta · KO/TKO | R1 1:38 | 2017-04-22 | UFC Fight Night: Swanson vs. Lobov |
| 77 | 1:40 | John Makdessi vs Lando Vannata | Lando Vannata · KO/TKO | R1 1:40 | 2016-12-10 | UFC 206: Holloway vs. Pettis |
| 78 | 1:40 | Uros Medic vs Aalon Cruz | Uros Medic · KO/TKO | R1 1:40 | 2021-03-06 | UFC 259: Blachowicz vs. Adesanya |
| 79 | 1:41 | Drakkar Klose vs Joe Solecki | Drakkar Klose · KO/TKO | R1 1:41 | 2023-12-02 | UFC Fight Night: Dariush vs. Tsarukyan |
| 80 | 1:44 | Nasrat Haqparast vs Jamie Mullarkey | Nasrat Haqparast · KO/TKO | R1 1:44 | 2023-12-09 | UFC Fight Night: Song vs. Gutierrez |
| 81 | 1:45 | Drew Dober vs Jason Gonzalez | Drew Dober · KO/TKO | R1 1:45 | 2016-09-10 | UFC 203: Miocic vs. Overeem |
| 82 | 1:45 | Manuel Torres vs Drew Dober | Manuel Torres · KO/TKO | R1 1:45 | 2025-03-29 | UFC Fight Night: Moreno vs. Erceg |
| 83 | 1:46 | Adriano Martins vs Islam Makhachev | Adriano Martins · KO/TKO | R1 1:46 | 2015-10-03 | UFC 192: Cormier vs Gustafsson |
| 84 | 1:46 | Chris Gruetzemacher vs Alexander Hernandez | Alexander Hernandez · KO/TKO | R1 1:46 | 2020-10-31 | UFC Fight Night: Hall vs. Silva |
| 85 | 1:47 | Jake Lindsey vs Joe Duffy | Joe Duffy · KO/TKO | R1 1:47 | 2015-03-14 | UFC 185: Pettis vs Dos Anjos |
| 86 | 1:48 | Caol Uno vs Fabiano Iha | Caol Uno · KO/TKO | R1 1:48 | 2001-06-29 | UFC 32: Showdown in the Meadowlands |
| 87 | 1:50 | Manuel Torres vs Nikolas Motta | Manuel Torres · KO/TKO | R1 1:50 | 2023-06-17 | UFC Fight Night: Vettori vs. Cannonier |
| 88 | 1:52 | Devin Powell vs Alvaro Herrera Mendoza | Devin Powell · KO/TKO | R1 1:52 | 2018-07-28 | UFC Fight Night: Alvarez vs. Poirier 2 |
| 89 | 1:54 | Joe Stevenson vs Mac Danzig | Mac Danzig · KO/TKO | R1 1:54 | 2010-12-11 | UFC 124: St-Pierre vs Koscheck 2 |
| 90 | 1:54 | Joe Proctor vs Magomed Mustafaev | Magomed Mustafaev · KO/TKO | R1 1:54 | 2015-12-12 | UFC 194: Aldo vs McGregor |
| 91 | 1:55 | Yves Edwards vs Jeremy Stephens | Yves Edwards · KO/TKO | R1 1:55 | 2012-12-08 | UFC on FOX: Henderson vs Diaz |
| 92 | 1:55 | Thiago Tavares vs Khabib Nurmagomedov | Khabib Nurmagomedov · KO/TKO | R1 1:55 | 2013-01-19 | UFC on FX: Belfort vs Bisping |
| 93 | 1:58 | Jared Gordon vs Diego Ferreira | Diego Ferreira · KO/TKO | R1 1:58 | 2018-02-18 | UFC Fight Night: Cerrone vs. Medeiros |
| 94 | 1:59 | Joe Proctor vs Jeremy Larsen | Joe Proctor · KO/TKO | R1 1:59 | 2012-06-01 | The Ultimate Fighter: Live Finale |
| 95 | 2:01 | John Makdessi vs Renee Forte | John Makdessi · KO/TKO | R1 2:01 | 2013-09-21 | UFC 165: Jones vs Gustafsson |
| 96 | 2:01 | Terrance McKinney vs Damir Hadzovic | Terrance McKinney · KO/TKO | R1 2:01 | 2025-02-01 | UFC Fight Night: Adesanya vs. Imavov |
| 97 | 2:05 | Mandel Nallo vs Jai Herbertgraded call | Jai Herbert · KO/TKO | R1 2:05 | 2026-04-18 | UFC Fight Night: Burns vs. Malott |
| 98 | 2:07 | Gray Maynard vs TJ Grant | TJ Grant · KO/TKO | R1 2:07 | 2013-05-25 | UFC 160: Velasquez vs Silva 2 |
| 99 | 2:07 | King Green vs Mauricio Ruffy | Mauricio Ruffy · KO/TKO | R1 2:07 | 2025-03-08 | UFC 313: Pereira vs. Ankalaev |
| 100 | 2:09 | Matt Wiman vs Brian Geraghty | Matt Wiman · KO/TKO | R1 2:09 | 2007-06-23 | The Ultimate Fighter: Team Pulver vs. Team Penn Finale |