noun
inside pitch
Baseball term for a pitch that passes close to the batter on the inside part of the strike zone.
彼は内角球をうまくさばいた。
He handled the inside pitch well.
内角球を狙って打つのは難しい。
It's difficult to aim for and hit an inside pitch.
内角 refers to the inside corner of the strike zone itself, while 内角球 is a pitch thrown there.
Compound of 内角 (inside corner) and 球 (ball, pitch).