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 Eung-soo
KBO Commissioner
Byun Hee-bong
Wei-wei's Grandfather
Kim Ji-young
Young Wei-wei
Ko Chang-seok
Detective So
Jo Jae-yun
Orthopedic Doctor