I'm no expert but my son caught for many years and most of the time on low pitches the throwing hand breaks away from the glove then you are reaching down to find the ball. If you get separation, move the glove to the throwing hand and at least that puts you back into the throwing position. Of course he should be working on both hands working as one unit on the low pitches and turning the glove into the hand not reaching into the glove for the ball.