noun
southpaw; left-handed person
Sports term for a left-handed player, especially a pitcher or boxer; it can also be used casually for a left-handed person in general.
彼はサウスポーの投手だ。
He is a southpaw pitcher.
うちの弟はサウスポーだ。
My younger brother is left-handed.
A katakana sports term. No language of origin is specified, so no specific borrowing history is asserted here.