MMA All-time Record Holders Author:SI StaffPublish date:May 14, 2012MMA All-time Record Holders Most UFC FightsDarryl Dennis/Icon SMI Youngest fighter to compete in octagonDarryl Dennis/Icon SMI Most career takedownsCliff Welch/Icon SMI Most UFC knockoutsJeff Vinnick/Zuffa LLC/Getty Images Most UFC submissionsDarryl Dennis/Icon SMI Most post-fight bonus awards, careerJon Kopaloff/Getty Images Oldest UFC title holder Kelvin Ma/Icon SMI Youngest UFC title holderJohn Adams/Icon SMI Most successful title defensesAl Bello/Zuffa LLC/[Zuffa LLC via Getty Images Most UFC championship fights Most knockouts in championship fightsBuda Mendes/LatinContent/Getty Images Most submissions in championship fightsJon Kopaloff/Getty Images Multiple-division UFC championsJon Kopaloff/Getty Images, Eric Jamison/APLatest NewsJake Paul’s Blunt Quote About Mike Tyson Resurfaces After Fight AnnouncementJake Paul to Fight Mike Tyson in Live Netflix Boxing EventJake Paul Bluntly Challenges Canelo Alvarez: ‘Stop Ducking’Boxing Pound-for-Pound Rankings: Canelo Alvarez Could Make Quick Return to PBCRyan Garcia Has Plenty of Questions to Answer Ahead of Devin Haney Fight