Champion— Full Cast

Don Lee

as Mark

Kwon Yul

as Jin-ki

Han Ye-ri

as Soo-jin

Choi Seung-hoon

as Joon-hyung

Ok Ye-rin

as Joon-hee

Son Sook

as Mark's Mother

John D. Michaels

as Fight Announcer

Carson Allen

as Announcer

Lee Kyu-ho

as Punch

Derek Chouinard

as Club Goer

No Ji-yoo

as Exhibition Hall Reporter

Jeon Gwon-ha

as Prison Punch Opponent

Yang Hyun-min

as Yoo Chang-soo

Nam Yeon-woo

as Team Leader Kim