Hi guys,
Fielding the ball out and away from your body is key to becoming a successful fielder. I teach my athletes to do this, and paint the picture like this: You catch a thrown ball or linedrive out front with your arms extended. You catch a pop up or fly ball with arms extended out and above your head, so why not catch a ground ball the same way?
The main reasons are:
A. to be agressive and "go get the ball" off the ground. If it is a short hop, you want to grap the ball right as it hits off the ground.
B. If you let the ball get "inside" of you, or into yor gut upon reveiving the ball, you eleminite the ability to watch the ball in your glove, as well as, allow for more errant opportunities (i.e ball hitting off heal of glove, slimply being susceptible to a late second bad hop.)
Once you receive a ground ball out front and away, then you pull both glove and throwing hand into chest as you assume the motion and hands seperation to make your throw.
I hope this answers any questions with clarity.