Stats on fight night weights (4 events)

[Kvothe_the_kingkiller]

Stats on the 4 California events which published delta's between weigh-in weights and fight night weights.

Number of events: 4 (UFC 227, UFC 232, UFC 241, Ladd v de Randamie)
Number of fighters: 98
Men's non-HW stats: (total = 76 fighters)

• Mean average: 10.6%
• Median average: 10.5%
• Mode: 9.5%

Women's stats: total = 18 fighters

• Mean Average: 9.8%
• Median Average: 9.1%
• Mode: 9.5%

Men's HW: 4 fighters. n/a.
Smallest cuts:

• Ryan Hall (v BJ Penn at 155. Later Ryan cut 9% v Elkins. Ironically he weighted 1lb heavier for his Elkins fight at 145 than he did for his Penn fight at 155).
• Kevin Holland 3.8%
  
• Casey Kenney 4.3%
• Anthony Pettis 4.5%
• Bevon Lewis 4.6%

Biggest cuts:

• Aspen Ladd 18.0%
  
• Manny Bermudez 17.7%
  
• Sheymon de Silva Moraes 17.0%
  
• Sodiq Yusuff 16.7%
  
• Alex Perez 16.3%

Spoiler: Raw Data

Ryan Hall 0.0%
Kevin Holland 3.8%
Casey Kenney 4.3%
Anthony Pettis 4.5%
Bevon Lewis 4.6%
BJ Penn 4.8%
Devonte Smith 5.0%
Cody Garbrandt 5.2%
Ilir Latifi 5.6%
Nate Diaz 5.9%
Michael F Rodriguez 6.0%
Alexander Gustafsson 6.4%
Andre Ewell 6.6%
Curtis Millender 7.3%
Khama Worthy 7.8%
Carlos Condit 7.9%
Siyar Bahadurzada 7.9%
Nathaniel Wood 8.0%
Benito Lopez 8.0%
John Allan Arte 8.0%
Cezar Ferreira 8.0%
Jon Jones 8.8%
Brian Kelleher 8.8%
Ryan Hall 9.0%
Wellington Turman 9.0%
Corey Anderson 9.2%
Uriah Hall 9.4%
Ian Heinisch 9.7%
Cory Sandhagen 9.7%
Cub Swanson 9.9%
Wuliji Buren 9.9%
Michael Chiesa 9.9%
Chad Mendes 9.9%
Petr Yan 9.9%
Andre Givens Fili 10.0%
Vince Morales 10.0%
Derek Brunson 10.1%
Marlon Vera 10.3%
T.J. Dillashaw 10.7%
Pedro Munhoz 11.0%
Pingyuan Liu 11.0%
Karl Roberson 11.0%
Ricky Simon 11.8%
Montel Jackson 11.8%
Sheymon Moraes 12.3%
Yoel Romero 12.3%
Thiago Santos 12.6%
Raphael Assuncao 12.6%
Gabriel Benitez 12.7%
Drakkar Klose 12.7%
Henry Cejudo 12.8%
Ricardo Ramos 12.9%
Matt Sayles 13.0%
Urijah Faber 13.0%
Ricky Simon 13.0%
Kyung Ho Kang 13.2%
Renato Moicano 13.4%
Jose Torres 13.5%
Demetrious Johnson 13.6%
Douglas Silva de Andrade 13.6%
Christos Giagos 13.7%
Alexander Volkanovski 14.0%
Montel Jackson 14.0%
Marvin Vettori 14.0%
Josh Emmett 14.0%
Jonathan Martinez 14.0%
Brandon Davis 14.7%
Paulo Costa 14.9%
Darren Elkins 15.0%
Mirsad Bektic 15.0%
Kyung Ho Kang 15.0%
Brett Johns 16.2%
Alex Perez 16.3%
Sodiq Yusuff 16.7%
Sheymon de Silva Moraes 17.0%
Manny Bermudez 17.7%

Julianne Pena 5.0%
Livia Dos Santos Souza 6.0%
Cat Zingano 6.8%
Anicia Brianna VanBurnen 7.0%
Danielle Taylor 7.3%
Megan Anderson 7.5%
Amanda Nunes 7.6%
Germaine De Randamie 9.0%
Shana Dobson 9.2%
Weili Zhang 9.5%
Hannah Cifers 9.7%
Jodie Esquibel 10.2%
Cris Cyborg 10.7%
Polyana Viana 11.6%
J.J. Aldrich 12.5%
Nicco Montano 13.0%
Sabina Mazo 15.6%
Aspen Ladd 18.0%

Daniel Cormier (236.5 pounds to 247 pounds = 4.4%) (NOTE: rumor is he wore heavy clothes with things in his pocket, on purpose, just to troll YOU, dear reader)
Walt Harris (258.5 to 260 = 0.5%)
Andrei Arlovski (245.5 to 248 = 1%)
Stipe Miocic (230.5 pounds to 233 pounds = 1.1%)

Spoiler: Sources

https://www.mmafighting.com/2018/8/...ut-six-fighters-come-in-over-csac-regulations
https://www.mmafighting.com/2019/1/...-only-had-4-5-pound-advantage-on-amanda-nunes
https://www.bloodyelbow.com/2019/8/...-the-card-exceeded-csac-10-threshold-mma-news

 

[Stalingrad9]

jOn JoNes CuTs ToO MuCh WeIgHt

More seriously, interesting stats. Hard to grasp what it actually means since I never cut weight myself

 

[Kvothe_the_kingkiller]

jOn JoNes CuTs ToO MuCh WeIgHt

More seriously, interesting stats. Hard to grasp what it actually means since I never cut weight myself

Lots of takeaways.

I think the biggest one is that CSAC first got into this thinking they put in a max weight gain of 10%. That was rule #7 in their 10 point plan (here). But it turns out that half of UFC fighters would fail if they implemented that rule. Nope, can't do that.

Which is good. They had a hypothesis, they tested it, they found their original plan would have been too restrictive, and instead they've taken action on fighters who gain 14.9% or more, not 10% or more. That is exactly how policy change is supposed to take shape.

Another takeaway is how evenly distributed the numbers are. For example, there are as many people at 7-10% as there are at 10-13%.