Who is the world's best men's mixed martial artist, regardless of weight class? My latest top-10 rankings are listed below.
In addition, here are my women's pound-for-pound rankings.
Note: Results through Jan. 4.
1. Demetrious Johnson
Div.: Flyweight (UFC)
Last: W (Sub5) Ray Borg, Oct. 7, 2017
Johnson is the longest-reigning champion in UFC, having surpassed the great Anderson Silva's mark of 10 consecutive title defenses. How many of these defenses will Johnson have when it's all said and done? As many as he wants, seems to be the answer.
2. Jon Jones
Div.: Light heavyweight (UFC)
Last: NC Daniel Cormier, July 29, 2017
Jones returned from two tumultuous years to regain his place as the No. 1 fighter in the world, only for it to come out he failed a drug test one day before his win over Daniel Cormier at UFC 214. He has maintained his innocence and will appeal.
3. TJ Dillashaw
Div.: Bantamweight (UFC)
Last: W (TKO2) Cody Garbrandt, Nov. 4, 2017
Dillashaw is a couple different scorecards away from an unbeaten record since 2012. His only two losses during that time were split decisions to Raphael Assuncao and Dominick Cruz -- both of which could have gone the other way. And now he's coming off a sensational finish over Cody Garbrandt.
4. Tyron Woodley
Div.: Welterweight (UFC)
Last: W (UD) Demian Maia, July 29, 2017
Woodley's title reign has been widely criticized, as his defenses over Stephen Thompson and Maia were incredibly slow five-round fights. He is, nevertheless, the undisputed champion and he did defend every single one of Maia's takedowns at UFC 214. You may not enjoy the way Woodley is fighting, but there's no denying he's one of the best in the world.
5. Max Holloway
Div.: Featherweight (UFC)
Last: W (TKO3) Jose Aldo, Dec. 2, 2017
We're only one title defense in to the 'Blessed Era,' and it's already been a fun ride. Holloway took the title from Jose Aldo, the most dominant champion in featherweight history, and then proved it was no fluke in an immediate rematch.
6. Khabib Nurmagomedov
Div.: Lightweight (UFC)
Last: W (UD) Edson Barboza, Dec. 30, 2017
Nurmagomedov returned from a 13-month layoff to crush the soul out of Edson Barboza at UFC 219. The problem with Nurmagomedov has never been talent, it's been health. If he's healthy in 2018, look out.
7. Conor McGregor
Div.: Lightweight/Featherweight (UFC)
Last: W (KO2) Eddie Alvarez, Nov. 12, 2016
McGregor is a two-weight UFC champion, and the current lightweight champion. Now he's coming off a spectacularly lucrative boxing match against Floyd Mayweather. When it comes to his next move, one thing's for sure: He has options.
8. Stipe Miocic
Div.: Heavyweight (UFC)
Last: W (TKO1) Junior dos Santos, May 13, 2017
UFC 211 brought dos Santos, the previous man to defeat Miocic (back in 2014). It resulted in another first-round knockout. That's five knockouts in a row for Cleveland's own. Dominant heavyweight champ? Could it be?
9. Daniel Cormier
Div.: Light heavyweight
Last: NC to Jon Jones, July 29, 2017
Heartbreak for 'DC' at UFC 214, followed by the announcement of a failed drug test by his rival Jon Jones. Once again, Cormier is the UFC's light heavyweight champion, but not in a way he ever wanted. Unfortunate turn of events in this all-time rivalry.
10. Tony Ferguson
Last: W (Sub3) Kevin Lee, Oct. 7, 2017
All Ferguson has done is won 10 consecutive fights, including a submission finish over Kevin Lee for the interim championship. He's all pace, all action -- and lately, all wins.