미스터 고

Xu Jiao

Wei-wei

Sung Dong-il

Sung Chung-su

Kim Kang-woo

Baseball Team Director

Kim Jung-tae

Rival Baseball Team Director

Joe Odagiri

Owner of Baseball Team Junichi Ito

Kim Hee-won

Loan Shark

Kim Eung-soo

KBO Commissioner

Byun Hee-bong

Wei-wei's Grandfather

Kim Ji-young

Young Wei-wei

Ko Chang-seok

Detective So

Don Lee

Caster

Kim Jung-eun

Jung-eun

Kim Heung-rae

Mr. Go

Jo Jae-yun

Orthopedic Doctor

Jeong In-gi

Gong In-gu