Strikers "evolved" by learning grappling, specifically Bjj. You can take a variety of striking arts and be effective, but all MMA fighters pretty much learn Bjj before they step into the cage.
BJJ? Or American JJ? Or Japanese JJ? Or some other form of grappling? Or maybe they pick it up along the way? I mean, where's your statistical support. Let's take a look at some of the top ranked people's backgrounds, shall we?
1. Cain Velasquez (13-1)
2x NCAA Division 1 All-American wrestler in folkstyle. Junior National champion in freestyle, 3rd place in Greco. Placed at senior nationals in Freestyle.
2. Junior dos Santos (16-3)
Started BJJ at 21. After 6 months of BJJ he started training MMA/boxing under his head trainer who has a background in boxing.
3. Fabricio Werdum (18-5-1)
BJJ World Champion, ADCC champion, blackbelt in BJJ and Judo.
4. Antonio Silva (18-5, 1 NC)
Trained Karate for 13 years before starting BJJ. Blackbelt in Judo and BJJ.
5. Travis Browne (16-2-1)
Started with Muay Thai. Former basketball player.
6. Josh Barnett (33-7)
High school folkstyle wrestler and later a catch wrestler. Awarded a BJJ black belt with 0 gi training. No-Gi World Champion at black belt and defeated Otavio Souza (a black belt world champion) by submission in a gi.
7. Alistair Overeem (37-13, 1 NC)
Started with no-gi grappling before kickboxing and MMA.
8. Stipe Miocic (11-1)
Folkstyle wrestler at the Division 1 level at Cleveland State. Also a star baseball player.
9. Mark Hunt (9-8-1)
Kickboxer.
10. Roy Nelson (20-9)
Wrestled folkstyle in high school before starting Kung Fu and later BJJ. BJJ black belt.
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1. Jon Jones (20-1)
NJCAA national champion in folkstyle wrestling. 5th place in nationals for Greco at the Cadet (age 16) age level.
2. Alexander Gustafsson (16-2)
Amateur boxer since age 10. Swedish Boxing champion.
3. Rashad Evans (19-3-1)
NJCAA champion, NCAA D1 folkstyle college wrestler. BJJ blackbelt.
4. Glover Teixeira (22-3)
Started with Boxing and Track before BJJ/MMA. BJJ blackbelt.
5. Anthony Johnson (17-4)
NJCAA Champion in folkstyle.
6. Dan Henderson (30-11)
Division 1 Folkstyle wrestler and multiple time Greco Roman national champion, Pan American Games Champion, Olympian.
7. Phil Davis (12-2, 1 NC)
4x NCAA Division 1 All American and 1x National Champion in Folkstyle wrestling. Nogi BJJ world champ at blue belt.
8. Ryan Bader (16-4)
2x NCAA Division 1 All-American in Folkstyle wrestling.
9. Emanuel Newton (23-7-1)
High school folkstyle wrestler.
10. Chael Sonnen (28-14-1)
NCAA Division 1 All-American in folkstyle. Silver medalist at University Worlds for Greco. University Nationals freestyle runner up.
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1. Chris Weidman (11-0)
2x NJCAA All-American and 2x NCAA Division 1 All-American in folkstyle wrestling. Attempted to make the Olympic team in Freestyle wrestling. ADCC competitor.
2. Anderson Silva (33-6)
Started training at age 12 in Taekwondo. TKD black belt, Muay Thai 'black belt', BJJ blackbelt, Judo blackbelt. Some professional boxing and muay thai experience.
3. Vitor Belfort (24-10)
Originally billed as Vitor Gracie, BJJ blackbelt and ADCC bronze medalist. 1 Pro boxing fight.
4. Ronaldo Souza (20-3, 1 NC)
Started with Judo. BJJ and Judo blackbelt, multiple time BJJ world champion, ADCC champion.
5. Lyoto Machida (21-4)
Shotokan Karate background with competitive Sumo wrestling experience. BJJ black belt.
6. Luke Rockhold (12-2)
High school folkstyle wrestler with some junior college wrestling experience. BJJ world champion at blue/purple. BJJ black belt. High level surfer.
7. Tim Kennedy (18-4)
High school folkstyle wrestling background. Black belt in Japanese Ju Jitsu and Army Combatives.
8. Yushin Okami (30-8)
Judo blackbelt.
9. Michael Bisping (24-6)
Japanese Ju Jitsu and kickboxing background.
10. Mark Munoz (13-4)
2x NCAA Division 1 All-American and 1x Champion in folkstyle wrestling. Junior World Freestyle silver medalist.
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1. Johny Hendricks (16-2)
4x NCAA D1 All-American, 2x Champ in folkstyle wrestling. 2x Junior National Freestyle champ.
2. Robbie Lawler (22-10, 1 NC)
High school folkstyle wrestling background.
3. Tyron Woodley (13-2)
2x NCAA D1 All-American in folkstyle wrestling. Runner up for freestyle wrestling at University Nationals. BJJ Brown Belt.
4. Carlos Condit (29-8)
Started MMA at 15. BJJ black belt.
5. Hector Lombard (34-4-1, 1 NC)
Olympian and multiple time national champion in Judo for Cuba. BJJ blackbelt.
6. Rory MacDonald (16-2)
Started MMA as a teenager. "No Gi" BJJ Blackbelt under Toshido gym.
7. Ben Askren (12-0)
4x NCAA D1 All-American, 4x Finalist, 2x Champion in folkstyle wrestling. National champion, Pan Ams Champion and Olympian in Freestyle wrestling. ADCC competitor and BJJ borwn belt.
8. Jake Shields (29-7-1, 1 NC)
2x Junior College All-American in folkstyle wrestling. Division 2 college wrestler. ADCC bronze medalist and Pan Ams champion (Purple Belt, Gi) despite never training in a gi. BJJ black belt.
9. Demian Maia (18-5)
Did Judo, Kung Fu, and Karate as a child. BJJ black belt and world champion. ADCC champion.
10. Jake Ellenberger (29-7)
High school swimmer, no high school wrestling. Started folkstyle wrestling in college at the division 2 level.
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1. Anthony Pettis (17-2)
Taekwondo background. TKD black belt and BJJ purple belt.
2. Benson Henderson (20-2)
2x NAIA All-American in folkstyle college wrestling. TKD and BJJ black belt. 3rd place in World Championships (Gi, Brown Belt) for BJJ.
3. Gilbert Melendez (21-3)
Division 2 folkstyle college wrestler. BJJ blackbelt, does not train in a gi.
4. T.J. Grant (21-5)
High school freestyle wrestling background (Canada, not US). BJJ brown belt.
5. Eddie Alvarez (25-3)
High school 'prep' All-American in folkstyle wrestling.
6. Michael Chandler (12-1)
NCAA D1 All-American in folkstyle college wrestling.
7. Josh Thomson (20-6, 1 NC)
Junior College folkstyle wrestler. Blackbelt in Guerilla Jiu Jitsu (Camarillo BJJ/Judo).
8. Khabib Nurmagomedov (22-0)
Started with Freestyle wrestling for 5 years before switching to Judo after "poor results" in wrestling. International Master of Sports in Sambo, Black Belt in Judo, International Master of Sports in Pankration, International Master of Sports in Hand-to-Hand Combat.
9. Nate Diaz (17-9)
BJJ black belt. Has a personal Sambo coach and a personal Boxing coach.
10. Rafael dos Anjos (20-6)
BJJ black belt. Purple Belt world champ.
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1. Jose Aldo (24-1)
Started with capoeira. BJJ black belt. World Cup champion at brown belt.
2. Chad Mendes (16-1)
2x NCAA D1 All-American folkstyle college wrestler, 1x runner up.
3. Ricardo Lamas (13-3)
NCAA D3 All-American folkstyle college wrestler.
4. Cub Swanson (20-5)
Started with BJJ before MMA. BJJ black belt.
5. Frankie Edgar (16-4-1)
NCAA D1 All-American folkstyle college wrestler. BJJ black belt.
6. Jeremy Stephens (23-9)
High school folkstyle wrestler. BJJ black belt.
7. Nik Lentz (24-6-2, 1 NC)
NCAA D1 folkstyle college wrestler. BJJ purple belt.
8. Chan Sung Jung (13-4)
Started Hapkido (a hybrid of TKD and Judo) as a child. Black belt in Hapkido, Black belt in Taekwondo, Green belt in Judo, Blue belt in Brazilian Jiu-Jitsu
9. Dustin Poirier (16-3)
Started with boxing and MMA. BJJ Brown belt.
10. Pat Curran (20-5)
High school folkstyle wrestling background.
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1. Renan Barao (32-1, 1 NC)
Father was a boxer and Barao started boxing as a child. Started BJJ at 14. BJJ black belt.
2. Urijah Faber (30-7)
NCAA D1 folkstyle college wrestler. BJJ Brown belt.
3. Michael McDonald (16-3)
Started kickboxing at age 10. BJJ Brown Belt.
4. Eddie Wineland (21-9-1)
High school folkstyle wrestling background. BJJ blue belt.
5. Raphael Assuncao (22-4)
BJJ blackbelt. Shotokan Karate background.
6. Eduardo Dantas (16-3)
MMA, "prefers striking"
7. T.J. Dillashaw (9-2)
NCAA D1 folkstyle college wrestler.
8. Marlon Moraes (13-4)
Started Muay Thai at age 7. National level Muay Thai fighter. BJJ brown belt.
9. Takeya Mizugaki (19-7-2)
Judo background. Started MMA after high school.
10. Iuri Alcantara (29-5, 1 NC)
"Marajoara Luta" folk wrestling background. It is a type of native folk wrestling where Alcantara grew up. BJJ black belt.
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1. Demetrious Johnson (19-2-1)
High school folkstyle wrestler.
2. Joseph Benavidez (20-4)
NAIA folkstyle college wrestler.
3. John Dodson (15-6)
High school folkstyle wrestler.
4. Ali Bagautinov (13-2)
International Master of Sports in Sambo, Master of Sports in Freestyle Wrestling, International Master of Sports in Pankration, Master of Sports in Hand-to-hand combat, Master of Sports in Greco-Roman Wrestling. Combat Sambo World Champion. Russian Champion for BJJ and Grappling and Pankration.
5. Ian McCall (12-4-1)
Junior college folkstyle wrestler.
6. Zach Makovsky (18-4)
NCAA D1 college folkstyle wrestler.
7. Jussier da Silva (16-3)
Started Judo at age 8. Judo and BJJ blackbelt.
8. John Lineker (23-7)
Started with MMA and Boxing.
9. John Moraga (14-2)
NCAA D1 college folkstyle wrestler. University freestyle wrestling champion.
10. Justin Scoggins (9-0)
Started Karate at age 3. Blackbelt in Kenpo Karate.
So, break it down, and it looks like...
Fighters who started their training in BJJ:
Junior dos Santos, Werdum, Belfort, dos Anjos, Swanson, Nate Diaz, Assuncao (?? it isn't clear from his wikipedia/UFC page/interviews)
6/80 = 7.5%
Fighters whose MMA games seem to be very BJJ based:
Fabricio Werdum, Rafael dos Anjos, Raphael Assuncao, Demian Maia, Iuri Alcantara, John Lineker, Renan Barao, Nate Diaz, Souza
9/10 = 11.25%
Fighters with a catch or folkstyle wrestling base:
Velasquez, Barnett, Miocic, Nelson, Jones, Evans, Johnson, Henderson, Davis, Bader, Newton, Sonnen, Weidman, Rockhold, Kennedy, Munoz, Hendricks, Lawler, Woodley, Askren, Shields, Ellenberger, Henderson, Melendez, Alvarez, Chandler, Thomson, Mendes, Lamas, Edgar, Stephens, Lentz, Curran, Faber, Wineland, Dillashaw, Johnson, Benavidez, Dodson, McCall, Makovsky, Moraga
42/80 = 52.5%
Fighters with some some sort of standup grappling base (catch, freestyle, judo, sambo):
Velasquez, Barnett, Miocic, Nelson, Jones, Evans, Johnson, Henderson, Davis, Bader, Newton, Sonnen, Weidman, Rockhold, Kennedy, Munoz, Hendricks, Lawler, Woodley, Askren, Shields, Ellenberger, Henderson, Melendez, Alvarez, Chandler, Thomson, Mendes, Lamas, Edgar, Stephens, Lentz, Curran, Faber, Wineland, Dillashaw, Johnson, Benavidez, Dodson, McCall, Makovsky, Moraga, Baguatinov, Alcantara, Mizugaki, Nurmagomedov, Grant, Maia, Lombard, Okami, Souza
51/80 = 63.75%
You can say what you want about statistics, but math doesn't lie.....on the other hand, it seems that every time you set your fingers to the keyboard, Hanzou (yeah, I'm talkin' to you!) something less than true winds up on our screens....I'm not calling you a liar, or anything else-but there is a word for someone who says things they believe to be true that clearly are not.....