Han Ye-ri

Soo-jin

Don Lee

Mark

Choi Seung-hoon

Joon-hyung

Kwon Yul

Jin-ki

Yoo Soon-woong

Doctor Han

Kim Jong-goo

Jin-gi's Father

John D. Michaels

Fight Announcer

Kim Yong-wan

Director

Kang Shin-hyo

Combo

Yang Hyun-min

Yoo Chang-soo

Lee Kyu-ho

Punch

Son Sook

Mark's Mother

Oh Chang-kyung

Event Announcer

Kang Seung-hyun

Joo-yun

Park Sun-ho

Jason Kim

Carson Allen

Announcer

Jay Choi

Executive Producer

Ok Ye-rin

Joon-hee

Derek Chouinard

Club Goer

No Ji-yoo

Exhibition Hall Reporter

Jeon Gwon-ha

Prison Punch Opponent

Nam Yeon-woo

Team Leader Kim

Park Hyung-Soon

Chang-soo's Employee

Park Won Bin

Busan MC

Park Seong-il

PD Park

Yu Seung-ok

Celebrity