If first impressions are any indication, Justin Gaethje has an eventful future ahead of him in the Ultimate Fighting Championship.

One of only 35 undefeated fighters on the UFC roster with at least one victory inside the Octagon, the onetime World Series of Fighting champion made his promotional debut in “The Ultimate Fighter 25” Finale main event on July 7 at T-Mobile Arena in Las Vegas, a reputation for unbridled violence preceding his arrival. Gaethje did not disappoint, as he overcame serious adversity to put away Michael Johnson with a volley of second-round punches and knees in a “Fight of the Year” contender. The 28-year-old Safford, Arizona, native brought it to a dramatic close 4:48 into Round 2, improving to 18-0 with 16 finishes as a pro. Gaethje will coach opposite former UFC and Bellator MMA titleholder Eddie Alvarez on Season 26 of “The Ultimate Fighter,” their appearances on the Fox Sports 1 reality show expected to culminate with a highly anticipated showdown later this year.

An updated list of undefeated fighters in the UFC:

Khabib Nurmagomedov

Record: 24-0 (8-0 UFC)
Last Fight: UFC 205 | Nov. 12, 2016
Result: def. Michael Johnson -- Submission (Kimura) 2:31 R3
Next Fight: None Scheduled

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Justin Gaethje

Record: 18-0 (1-0 UFC)
Last Fight: “The Ultimate Fighter 25” Finale | July 7, 2017
Result: def. Michael Johnson -- TKO (Punches and Knees) 4:48 R2
Next Fight: None Scheduled

***

Darren Till

Record: 14-0-1 (2-0-1 UFC)
Last Fight: UFC Fight Night 109 | May 28, 2017
Result: def. Jessin Ayari -- Unanimous Decision
Next Fight: vs. Bojan Velickovic | UFC Fight Night 115 | Sept. 2, 2017

***

Magomed Bibulatov

Record: 14-0 (1-0 UFC)
Last Fight: UFC 210 | April 8, 2017
Result: def. Jenel Lausa -- Unanimous Decision
Next Fight: vs. John Moraga | UFC 216 | Oct. 7, 2017

***

Joanna Jedrzejczyk

Record: 14-0 (8-0 UFC)
Last Fight: UFC 211 | May 13, 2017
Result: def. Jessica Andrade -- Unanimous Decision
Next Fight: None Scheduled

***

Brett Johns

Record: 14-0 (2-0 UFC)
Last Fight: UFC Fight Night 113 | July 16, 2017
Result: def. Albert Morales -- Unanimous Decision
Next Fight: None Scheduled

***

Jarred Brooks

Record: 13-0 (1-0 UFC)
Last Fight: UFC 214 | July 29, 2017
Result: def. Eric Shelton -- Split Decision
Next Fight: None Scheduled

***

Alberto Mina

Record: 13-0 (3-0 UFC)
Last Fight: UFC Fight Night 90 | July 7, 2016
Result: def. Mike Pyle -- KO (Flying Knee) 1:17 R1
Next Fight: None Scheduled

***

Viviane Pereira

Record: 13-0 (2-0 UFC)
Last Fight: UFC 212 | June 3, 2017
Result: def. Jamie Moyle -- Unanimous Decision
Next Fight: None Scheduled

***

Deiveson Figueiredo

Record: 12-0 (1-0 UFC)
Last Fight: UFC 212 | June 3, 2017
Result: def. Marco Beltran -- TKO (Corner Stoppage) 5:00 R2
Next Fight: None Scheduled

***

Brian Ortega

Record: 12-0 (4-0 UFC)
Last Fight: UFC 214 | July 29, 2017
Result: def. Renato Carneiro -- Submission (Guillotine Choke) 2:59 R3
Next Fight: vs. None Scheduled

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Cody Garbrandt

Record: 11-0 (6-0 UFC)
Last Fight: UFC 207 | Dec. 30, 2016
Result: def. Dominick Cruz -- Unanimous Decision
Next Fight: vs. T.J. Dillashaw | UFC 217 | Nov. 4, 2017

***

Naoki Inoue

Record: 11-0 (1-0 UFC)
Last Fight: UFC Fight Night 111 | June 17, 2017
Result: def. Carls John de Tomas -- Unanimous Decision
Next Fight: vs. Jenel Lausa | UFC Fight Night 117 | Sept. 23, 2017

***

Jeremy Kennedy

Record: 11-0 (3-0 UFC)
Last Fight: UFC on Fox 25 | July 22, 2017
Result: def. Kyle Bochniak -- Unanimous Decision
Next Fight: vs. None Scheduled

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Niko Price

Record: 11-0 (3-0 UFC)
Last Fight: UFC Fight Night 114 | Aug. 5, 2017
Result: def. Alan Jouban -- TKO (Punches) 1:44 R1
Next Fight: None Scheduled

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Shane Burgos

Record: 10-0 (3-0 UFC)
Last Fight: UFC on Fox 25 | July 22, 2017
Result: def. Godofredo Castro -- Unanimous Decision
Next Fight: vs. None Scheduled

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Paulo Henrique Costa

Record: 10-0 (2-0 UFC)
Last Fight: UFC 212 | June 3, 2017
Result: def. Oluwale Bamgbose -- TKO (Punches) 1:06 R2
Next Fight: vs. Johny Hendricks | UFC 217 | Nov. 4, 2017

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Trevin Giles

Record: 10-0 (1-0 UFC)
Last Fight: UFC 213 | July 8, 2017
Result: def. James Bochnovic -- KO (Punch) 2:54 R2
Next Fight: None Scheduled

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Gavin Tucker

Record: 10-0 (1-0 UFC)
Last Fight: UFC Fight Night 105 | Feb. 19, 2017
Result: def. Sam Sicilia -- Unanimous Decision
Next Fight: vs. Rick Glenn | UFC 215 | Sept. 9, 2017

***

Eryk Anders

Record: 9-0 (1-0 UFC)
Last Fight: UFC on Fox 25 | July 22, 2017
Result: def. Rafael Natal -- KO (Punches) 2:54 R1
Next Fight: None Scheduled

***

Gregor Gillespie

Record: 9-0 (2-0 UFC)
Last Fight: UFC 210 | April 8, 2017
Result: def. Andrew Holbrook -- KO (Punches) 0:21 R1
Next Fight: vs. Jason Gonzalez | UFC Fight Night 116 | Sept. 16, 2017

***

Joseph Morales

Record: 9-0 (1-0 UFC)
Last Fight: UFC Fight Night 114 | Aug. 5, 2017
Result: def. Roberto Sanchez -- Submission (Rear-Naked Choke) 3:56 R1
Next Fight: None Scheduled

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Drakkar Klose

Record: 8-0-1 (2-0 UFC)
Last Fight: “The Ultimate Fighter 25” Finale | July 7, 2017
Result: def. Marc Diakiese -- Split Decision
Next Fight: None Scheduled

***

Jordan Johnson

Record: 8-0 (2-0 UFC)
Last Fight: “The Ultimate Fighter 25” Finale | July 7, 2017
Result: def. Marcel Fortuna -- Unanimous Decision
Next Fight: None Scheduled

***

Justin Ledet

Record: 8-0 (2-0 UFC)
Last Fight: UFC Fight Night 99 | Nov. 19, 2016
Result: def. Mark Godbeer -- Submission (Rear-Naked Choke) 2:16 R1
Next Fight: vs. Dmitriy Sosnovskiy | UFC Fight Night 116 | Sept. 16, 2017

***

Felipe Silva

Record: 8-0 (1-0 UFC)
Last Fight: UFC on Fox 21 | Aug. 27, 2016
Result: def. Shane Campbell -- TKO (Punches) 1:13 R1
Next Fight: vs. Mairbek Taisumov | UFC Fight Night 115 | Sept. 2, 2017

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Ketlen Vieira

Record: 8-0 (2-0 UFC)
Last Fight: UFC on Fox 24 | April 15, 2017
Result: def. Ashlee Evans-Smith -- Unanimous Decision
Next Fight: vs. Sara McMann | UFC 215 | Sept. 9, 2017

***

Dominick Reyes

Record: 7-0 (1-0 UFC)
Last Fight: UFC Fight Night 112 | June 25, 2017
Result: def. Joachim Christensen -- TKO (Punches) 0:29 R1
Next Fight: None Scheduled

***

Aiemann Zahabi

Record: 7-0 (1-0 UFC)
Last Fight: UFC Fight Night 105 | Feb. 19, 2017
Result: def. Reginaldo Vieira -- Unanimous Decision
Next Fight: None Scheduled

***

Cynthia Calvillo

Record: 6-0 (3-0 UFC)
Last Fight: UFC Fight Night 113 | July 16, 2017
Result: def. Joanne Calderwood -- Unanimous Decision
Next Fight: None Scheduled

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Chris Holdsworth

Record: 6-0 (2-0 UFC)
Last Fight: UFC 173 | May 24, 2014
Result: def. Chico Camus -- Unanimous Decision
Next Fight: None Scheduled

***

Tyson Pedro

Record: 6-0 (2-0 UFC)
Last Fight: UFC 209 | March 4, 2017
Result: def. Paul Craig -- TKO (Elbows) 4:10 R1
Next Fight: vs. Ilir Latifi | UFC 215 | Sept. 9, 2017

***

Mickey Gall

Record: 4-0 (3-0 UFC)
Last Fight: UFC on Fox 22 | Dec. 17, 2016
Result: def. Sage Northcutt -- Submission (Rear-Naked Choke) 1:40 R2
Next Fight: None Scheduled

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Tatiana Suarez

Record: 4-0 (1-0 UFC)
Last Fight: “The Ultimate Fighter 23” Finale | July 8, 2016
Result: def. Amanda Bobby Cooper -- Submission (Brabo Choke) 3:43 R1
Next Fight: None Scheduled

***

Aleksandra Albu

Record: 3-0 (2-0 UFC)
Last Fight: UFC 214 | July 29, 2017
Result: def. Kailin Curran -- Unanimous Decision
Next Fight: None Scheduled