Kyojin no Hoshi (TV Series, 182 episodes, AniDB)

Requested before Jun 2019

In 1969, at the press conference of Nagashima Shigeo who was joining a professional baseball team, Yomiurhi Kyojin, a ball was thrown at him by a boy. He was Hoshi Hyuma, and a thrown ball meant a letter of challenge. His father, Hoshi Ittetsu, had trained Huma since he had been very young to achieve his dream to make him a professional baseball player. Source: AnimeNfo