noun
sidearm throw; sidearm pitch
Baseball term for a throwing or pitching motion where the arm comes from the side, below shoulder level. Wasei-eigo from English 'side throw'.
wasei-eigo (Japanese-coined English), from side throw
彼はサイドスローから鋭い球を投げる。
He throws a sharp ball from a sidearm delivery.
サイドスローの
Sidearm pitchers are difficult for batters to hit.