Most impressive title run

[Dark Lord Al]

LIGHT FLYWEIGHT.
Myung woo Yuh made 17 defences in the same division as Jung Koo Chang , they were champions at the same time but never fought.He lost his first fight to Hiroki Ioka on a split verdict , won the return , then defended the title 1 more time before retiring - 38 wins - 1 loss ( avenged ) 14 ko's.
Always wanted him to fight Chang. He was a great little fighter.