"Throwing around the body" can take a few interpretations.
I agree with Ken's point, that many top-level pitchers achieve "lag" in a somewhat behind-the-body position around 9:00.
In the case of younger, more novice pitchers, it usually is indicated by a disconnected upper and lower body,
with shoulders rotated mostly square ("Closed") at release, and the hips remaining more open.
Hips that "clear the arm" at release, tend to remain in this position.
I think this is what is meant when cautioning against throwing "around" the body, vs "across" it
I agree with Ken's point, that many top-level pitchers achieve "lag" in a somewhat behind-the-body position around 9:00.
In the case of younger, more novice pitchers, it usually is indicated by a disconnected upper and lower body,
with shoulders rotated mostly square ("Closed") at release, and the hips remaining more open.
Hips that "clear the arm" at release, tend to remain in this position.
I think this is what is meant when cautioning against throwing "around" the body, vs "across" it