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FightIQ · UFC stats · UFC split decision rate by referee

UFC split decision rate by referee

Across the UFC record, the split decision rate is highest under Jerin Valel at 14% (91 fights) and lowest under Osiris Maia at 4% (56 fights).

How often the judges disagree — split decisions as a share of all UFC fights.
Computed from 7,178 fights · 30 referees · updated 20 September 2026
Split decision rate by referee30 bars. Highest: Jerin Valel at 14% from 91 fights. The table below carries every value.Herb DeanHerb Dean: 9% (1,223 fights)9%John McCarthyJohn McCarthy: 6% (621 fights)6%Marc GoddardMarc Goddard: 9% (599 fights)9%Dan MiragliottaDan Miragliotta: 8% (491 fights)8%Jason HerzogJason Herzog: 10% (455 fights)10%Mark SmithMark Smith: 10% (437 fights)10%Chris TognoniChris Tognoni: 11% (434 fights)11%Keith PetersonKeith Peterson: 10% (391 fights)10%Mario YamasakiMario Yamasaki: 11% (388 fights)11%Yves LavigneYves Lavigne: 11% (264 fights)11%Steve MazzagattiSteve Mazzagatti: 4% (199 fights)4%Mike BeltranMike Beltran: 8% (197 fights)8%Leon RobertsLeon Roberts: 8% (193 fights)8%Kerry HatleyKerry Hatley: 10% (163 fights)10%Josh RosenthalJosh Rosenthal: 12% (120 fights)12%Kevin MacDonaldKevin MacDonald: 10% (109 fights)10%Jerin ValelJerin Valel: 14% (91 fights)14%Steve PercevalSteve Perceval: 13% (90 fights)13%Jacob MontalvoJacob Montalvo: 8% (78 fights)8%John SharpJohn Sharp: 9% (76 fights)9%Rich MitchellRich Mitchell: 9% (76 fights)9%Lukasz BosackiLukasz Bosacki: 8% (73 fights)8%Kevin MulhallKevin Mulhall: 8% (60 fights)8%Osiris MaiaOsiris Maia: 4% (56 fights)4%Daniel MovahediDaniel Movahedi: 9% (55 fights)9%Blake GriceBlake Grice: 13% (54 fights)13%Gary CopelandGary Copeland: 6% (51 fights)6%Kevin SatakiKevin Sataki: 8% (48 fights)8%Neil HallNeil Hall: 9% (44 fights)9%Kim WinslowKim Winslow: 10% (42 fights)10%
Split decision rate by referee · every value is in the table below, with the number of fights behind it.
RefereeSplit-decision rateSplit decisionsFights
Herb Dean9%1141,223
John McCarthy6%37621
Marc Goddard9%52599
Dan Miragliotta8%39491
Jason Herzog10%44455
Mark Smith10%44437
Chris Tognoni11%46434
Keith Peterson10%39391
Mario Yamasaki11%43388
Yves Lavigne11%30264
Steve Mazzagatti4%8199
Mike Beltran8%15197
Leon Roberts8%16193
Kerry Hatley10%16163
Josh Rosenthal12%14120
Kevin MacDonald10%11109
Jerin Valel14%1391
Steve Perceval13%1290
Jacob Montalvo8%678
John Sharp9%776
Rich Mitchell9%776
Lukasz Bosacki8%673
Kevin Mulhall8%560
Osiris Maia4%256
Daniel Movahedi9%555
Blake Grice13%754
Gary Copeland6%351
Kevin Sataki8%448
Neil Hall9%444
Kim Winslow10%442
What counts. A split decision is the official record’s own method code (“Decision - Split”); majority decisions are a separate code and are not counted here. The share is of ALL fights, not of decisions only. 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.
Split decision rate — cut another way
Other UFC stat answers