社会 しゃかい じん野球 やきゅうでしょう
shakaijin'yakyūdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 社会人野球

1. Probably a company baseball player.; Probably an adult baseball player (affiliated with a company).

Polite
Presumptive
Conjecture