Here are real life examples that prove that size doesn't matter in combat sports.
That's what can happen when you put David vs Goliath
2- Daiju Takase vs Emmanuel Yarborough
169 lbs vs 600 lbs
3- Royce Gracie vs Akebono
6'1", 180 lbs vs 6'8", 486 lbs
Here is another giant-sized sumo wrestler, this one is a former Yokozuna (Grand Champion) pitted versus former UFC champion & legendary fighter Royce Gracie.
4- The "Minowaman" Ikuhisa Minowa case
At 5'9", 185 lbs, Minowaman is MMA's Giant Killer. Despite his below average frame, Minowaman isn't affraid to regularly take fights against much larger opponents and, more often than not, defeat them. The phenomenal Minowaman defeated Hong Man Choi (7'2", 360 lbs), Bob Sapp (6'4", 355 lbs), Butterbean (5'11", over 330 lbs), Kimo Leopold (6'2", 240 lbs), former UFC champion Don Frye (6'1", 230 lbs), WWE Bart Gunn aka Mike Polchlopek (6'3", 258 lbs), muscleman Jimmy Ambriz (6'1", 330 lbs), Chang Hee Kim of South Korea (over 300 lbs) and more... Generally, Minowaman goes into each fight with at the very least 20 pounds lighter than his opponent. Does it make him an underdog? Not at all! With Minowaman, the bigger they are the harder they fall.
5- "The Manassa Mauler" Jack Dempsey
At 6'1", 187 lbs, Jack Dempsey was one of the five greatest boxer of all-time. He was a world-famous case of Davide and Goliath when he almost killed the 6'7", 250 lbs Jess Willard for the World Heavyweight Boxing Title. KO'ed the 6'2", 212 lbs Luis Angel Firpo in an epic two rounds brawl. At one times, Dempsey was even send flying outside of the ring. KO'ed the 6'6", 210 lbs white hope Fred Fulton in 18 seconds.
6- Genki Sudo vs Butterbean
5'9", 154 lbs vs 5'11", over 330 lbs
Butterbean getting flattened by a man half his size.
7- Fedor Emilianenko vs Zulu
6'1", 230 lbs vs 6'7", 407 lbs
The Last Emperor didn't bother with weight classes. He know the result will always be the same... Look at him while he squashed his much more bigger and taller foe in a matter of seconds.
8- Frankie Garcia vs Jeep Swenson
205 lbs vs 6'4", 281 lbs
Look at the small tomato can Frank Garcia KTFO of wrestling bear Robert "Jeep" Swenson.
In my view, weight classes are useless and stupid in combat sports. When you get into a street fight and you got to fight for your life, you don't ask for a weight-in. It's not a matter of who is the heaviest and who got of 5-pound weight advantage. It's a matter of who can kick the ass of the other. So should be any kind of hand-to-hand fighting sports.
All the greatest and most dominant heavyweight boxing champion were relativelly "small". Muhammad Ali was 212 lbs, Joe Louis was 199 lbs, Jack Dempsey was 187 lbs, Mike Tyson was 220 lbs, Bob Fitzsimmons was 167 lbs, and Rocky Marciano was 5'10", 185 lbs. And in MMA, you got no better example than the skinny 6'1", then 175 lbs Royce Gracie who dominated the early UFC. Back when it was real "No-Hold-Barred" competition. Bruce Lee was supposedly the greatest fighter of all-time. He was just 5'7", 140 lbs soaked and wet. If you can't stand the heat, get out of the kitchen.
The buttom line is that I don't care who is the best 130-pound fighter of the planet!?! I just want to know who's the best fighter of the planet. Period.