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FightIQ · UFC stats · UFC knockout rate by referee

UFC knockout rate by referee

Across the UFC record, the knockout rate is highest under Gary Copeland at 41% (51 fights) and lowest under Jacob Montalvo at 26% (78 fights).

How often a UFC fight ends in a knockout — the number itself, not a highlight reel, every bout on the official record since 1994.
Computed from 7,178 fights · 30 referees · updated 20 September 2026
Knockout rate by referee30 bars. Highest: Gary Copeland at 41% from 51 fights. The table below carries every value.Herb DeanHerb Dean: 36% (1,223 fights)36%John McCarthyJohn McCarthy: 40% (621 fights)40%Marc GoddardMarc Goddard: 33% (599 fights)33%Dan MiragliottaDan Miragliotta: 38% (491 fights)38%Jason HerzogJason Herzog: 32% (455 fights)32%Mark SmithMark Smith: 33% (437 fights)33%Chris TognoniChris Tognoni: 29% (434 fights)29%Keith PetersonKeith Peterson: 29% (391 fights)29%Mario YamasakiMario Yamasaki: 34% (388 fights)34%Yves LavigneYves Lavigne: 30% (264 fights)30%Steve MazzagattiSteve Mazzagatti: 35% (199 fights)35%Mike BeltranMike Beltran: 34% (197 fights)34%Leon RobertsLeon Roberts: 33% (193 fights)33%Kerry HatleyKerry Hatley: 34% (163 fights)34%Josh RosenthalJosh Rosenthal: 28% (120 fights)28%Kevin MacDonaldKevin MacDonald: 33% (109 fights)33%Jerin ValelJerin Valel: 29% (91 fights)29%Steve PercevalSteve Perceval: 32% (90 fights)32%Jacob MontalvoJacob Montalvo: 26% (78 fights)26%John SharpJohn Sharp: 26% (76 fights)26%Rich MitchellRich Mitchell: 26% (76 fights)26%Lukasz BosackiLukasz Bosacki: 30% (73 fights)30%Kevin MulhallKevin Mulhall: 35% (60 fights)35%Osiris MaiaOsiris Maia: 32% (56 fights)32%Daniel MovahediDaniel Movahedi: 29% (55 fights)29%Blake GriceBlake Grice: 28% (54 fights)28%Gary CopelandGary Copeland: 41% (51 fights)41%Kevin SatakiKevin Sataki: 38% (48 fights)38%Neil HallNeil Hall: 30% (44 fights)30%Kim WinslowKim Winslow: 33% (42 fights)33%
Knockout rate by referee · every value is in the table below, with the number of fights behind it.
RefereeKnockout rateKnockoutsFights
Herb Dean36%4391,223
John McCarthy40%248621
Marc Goddard33%199599
Dan Miragliotta38%188491
Jason Herzog32%145455
Mark Smith33%146437
Chris Tognoni29%126434
Keith Peterson29%115391
Mario Yamasaki34%132388
Yves Lavigne30%80264
Steve Mazzagatti35%69199
Mike Beltran34%66197
Leon Roberts33%64193
Kerry Hatley34%55163
Josh Rosenthal28%34120
Kevin MacDonald33%36109
Jerin Valel29%2691
Steve Perceval32%2990
Jacob Montalvo26%2078
John Sharp26%2076
Rich Mitchell26%2076
Lukasz Bosacki30%2273
Kevin Mulhall35%2160
Osiris Maia32%1856
Daniel Movahedi29%1655
Blake Grice28%1554
Gary Copeland41%2151
Kevin Sataki38%1848
Neil Hall30%1344
Kim Winslow33%1442
What counts. A knockout here is any bout the official record ends by KO/TKO, including a doctor’s stoppage, which UFCStats files as its own method. A fight is a UFC bout on the official record with a result. Draws, no-contests and overturned results are excluded from every count on this page; disqualifications and could-not-continues are counted as fights, which is why the knockout, submission and decision shares do not add up to 100%. How this table is cut. The 30 referees with the most UFC bouts on the official record. A referee does not choose the assignments, so these are differences in the fights each one was given as much as in how each one calls them. 1,545 fights are outside this table. They were officiated by somebody outside those 30, or carry no referee on the record. They are not missing from our record — they are on the year-by-year archive like every other bout; there is simply no row here for them to sit in. Check us. Every number here is recomputed from the official UFC statistical record on each build — nothing on this page is typed in by hand. Search every fight to filter the same record yourself, or start from the year-by-year archive.
Knockout rate — cut another way
Other UFC stat answers