Frame #A -- Pre-Launch Mechanics
The batter has taken an athletic stance in the box, similar to the ready position of a tennis player or soccer goalie. A slightly crouched position with the weight carried mainly on the balls of the feet and fairly evenly distributed on the legs.
There is no absolute rule as to where a batter should hold his hands or bat in the stance. In this picture, the batter has his hands 10 to 12 inches away from the back-shoulder. However, Barry Bonds' style would have the hands lower and more forward in the stance. On the other hand, A-Rod holds the hands fairly high above the shoulder.
"Style vs Absolute" Rules of Good Hitting
Why we Chose the Front View for Swing Mechanics