noun
overhand throw; overhand pitch
Baseball term for a throwing or pitching motion where the arm comes from above the shoulder. Despite the English source 'overthrow', it does not mean an errant throw.
wasei-eigo (Japanese-coined English), from overthrow
彼はオーバースローで速球を投げる。
He throws a fastball with an overhand delivery.
Sidearm throw; the arm comes from a lower, more horizontal angle compared to オーバースロー.
Underhand throw; the arm comes from below the waist, opposite of オーバースロー.
Wasei-eigo from English 'overthrow', but the meaning shifted to 'overhand throw' in Japanese baseball terminology.