Injuries, inactivity and issues with the scale have thus far proven to be lightweight contender Khabib Nurmagomedov’s greatest obstacles.

Front and center in an exclusive group as one of 33 undefeated fighters on the Ultimate Fighting Championship roster with at least one victory inside the Octagon, Nurmagomedov will compete for the first time in more than a year when he faces former Ring of Combat champion Edson Barboza in the UFC 219 co-main event on Dec. 30 at T-Mobile Arena in Las Vegas. There, the American Kickboxing Academy representative puts his perfect 24-0 record on the line in hopes of positioning himself as a challenger for either undisputed champion Conor McGregor or interim titleholder Tony Ferguson. Nurmagomedov last competed at UFC 205 on Nov. 12, 2016, when he submitted Michael Johnson with a third-round kimura.

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: vs. Edson Barboza | UFC 219 | Dec. 30, 2017

***

Darren Till

Record: 16-0-1 (4-0-1 UFC)
Last Fight: UFC Fight Night 118 | Oct. 21, 2017
Result: def. Donald Cerrone -- TKO (Punches) 4:20 R1
Next Fight: None Scheduled

***

Brett Johns

Record: 15-0 (3-0 UFC)
Last Fight: “The Ultimate Fighter 26” Finale | Dec. 1, 2017
Result: def. Joe Soto -- Submission (Calf Slicer) 0:30 R1
Next Fight: None Scheduled

***

Deiveson Figueiredo

Record: 13-0 (2-0 UFC)
Last Fight: UFC Fight Night 119 | Oct. 28, 2017
Result: def. Jarred Brooks -- Split Decision
Next Fight: vs. Joseph Moraeles | UFC Fight Night 125 | Feb. 4, 2018

***

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

***

Brian Ortega

Record: 13-0 (5-0 UFC)
Last Fight: UFC Fight Night 123 | July 29, 2017
Result: def. Cub Swanson -- Submission (Guillotine Choke) 3:22 R2
Next Fight: None Scheduled

***

Paulo Henrique Costa

Record: 11-0 (3-0 UFC)
Last Fight: UFC 217 | Nov. 4, 2017
Result: def. Johny Hendricks -- TKO (Punches) 1:26 R2
Next Fight: None Scheduled

***

Trevin Giles

Record: 11-0 (2-0 UFC)
Last Fight: UFC Fight Night 123 | Dec. 9, 2017
Result: def. Antonio Braga Neto -- KO (Punches) 2:27 R3
Next Fight: None Scheduled

***

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: None Scheduled

***

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: None Scheduled

***

Oskar Piechota

Record: 10-0-1 (1-0 UFC)
Last Fight: UFC Fight Night 118 | Oct. 21, 2017
Result: def. Jonathan Wilson -- Unanimous Decision
Next Fight: None Scheduled

***

Eryk Anders

Record: 10-0 (2-0 UFC)
Last Fight: UFC Fight Night 123 | Dec. 9, 2017
Result: def. Markus Perez -- Unanimous Decision
Next Fight: vs. Lyoto Machida | UFC Fight Night 125 | Feb. 3, 2018

***

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. Calvin Kattar | UFC 220 | Jan. 20, 2018

***

Gregor Gillespie

Record: 10-0 (3-0 UFC)
Last Fight: UFC Fight Night 116 | Sept. 16, 2017
Result: def. Jason Gonzalez -- Submission (Arm-Triangle Choke) 2:11 R2
Next Fight: vs. Jordan Rinaldi | UFC on Fox 27 | Jan. 27, 2018

***

Justin Ledet

Record: 9-0 (3-0 UFC)
Last Fight: UFC Fight Night 116 | Sept. 16, 2017
Result: def. Azunna Anyanwu -- Split Decision
Next Fight: None Scheduled

***

Benito Lopez

Record: 9-0 (1-0 UFC)
Last Fight: UFC Fight Night 123 | Dec. 9, 2017
Result: def. Albert Morales -- Unanimous Decision
Next Fight: None Scheduled

***

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: vs. Deiveson Figueiredo | UFC Fight Night 125 | Feb. 3, 2018

***

Sean O’Malley

Record: 9-0 (1-0 UFC)
Last Fight: “The Ultimate Fighter 26” Finale | Dec. 1, 2017
Result: def. Terrion Ware -- Unanimous Decision
Next Fight: None Scheduled

***

Ketlen Vieira

Record: 9-0 (3-0 UFC)
Last Fight: UFC 215 | Sept. 9, 2017
Result: def. Sara McMann -- Submission (Arm-Triangle Choke) 4:16 R2
Next Fight: vs. Cat Zingano | UFC 222 | March 3, 2018

***

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

***

Dominick Reyes

Record: 8-0 (2-0 UFC)
Last Fight: UFC 218 | Dec. 2, 2017
Result: def. Jeremy Kimball -- Submission (Rear-Naked Choke) 3:39 R1
Next Fight: None Scheduled

***

Arjan Bhullar

Record: 7-0 (1-0 UFC)
Last Fight: UFC 215 | Sept. 9, 2017
Result: def. Luis Henrique Barbosa de Oliveira -- 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: vs. Carla Esparza | UFC 219 | Dec. 30, 2017

***

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

***

Daichi Abe

Record: 6-0 (1-0 UFC)
Last Fight: UFC Fight Night 117 | Sept. 22, 2017
Result: def. Hyun Gyu Lim -- Unanimous Decision
Next Fight: None Scheduled

***

Marcelo Golm

Record: 6-0 (1-0 UFC)
Last Fight: UFC Fight Night 119 | Oct. 28, 2017
Result: def. Christian Colombo -- Submission (Rear-Naked Choke) 2:08 R1
Next Fight: vs. Timothy Johnson | UFC Fight Night 125 | Feb. 3, 2018

***

Syuri Kondo

Record: 6-0 (1-0 UFC)
Last Fight: UFC Fight Night 117 | Sept. 22, 2017
Result: def. Chanmi Jeon -- Split Decision
Next Fight: None Scheduled

***

Aspen Ladd

Record: 6-0 (1-0 UFC)
Last Fight: UFC Fight Night 118 | Oct. 21, 2017
Result: def. Lina Lansberg -- TKO (Punches) 2:33 R2
Next Fight: None Scheduled

***

Karl Roberson

Record: 6-0 (1-0 UFC)
Last Fight: UFC Fight Night 120 | Nov. 11, 2017
Result: def. Darren Stewart -- Submission (Rear-Naked Choke) 3:41 R1
Next Fight: None Scheduled

***

Tai Tuivasa

Record: 6-0 (1-0 UFC)
Last Fight: UFC Fight Night 121 | Nov. 19, 2017
Result: def. Rashad Coulter -- KO (Flying Knee) 4:35 R1
Next Fight: vs. Cyril Asker | UFC 221 | Feb. 10, 2018

***

Nadia Kassem

Record: 5-0 (1-0 UFC)
Last Fight: UFC Fight Night 121 | Nov. 19, 2017
Result: def. Alex Chambers -- Unanimous Decision
Next Fight: None Scheduled

***

Tatiana Suarez

Record: 5-0 (2-0 UFC)
Last Fight: UFC Fight Night 120 | Nov. 11, 2017
Result: def. Viviane Pereira -- Unanimous Decision
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