noun
professional baseball
Refers to the professional baseball league in Japan (NPB) or generically to professional baseball as a sport.
彼はプロ野球選手になるのが夢だ。
His dream is to become a professional baseball player.
プロ野球のシーズンが始まった。
The professional baseball season has started.
Compound of プロ (professional) and 野球 (baseball).