When the ball is on the ground a player is allowed to block/obstruct an opposing player from getting to the ball with the body, it's called boxing out and completely legal, the ref was wrong and a bad call.
Here's the rule, in its entirety:
q. Detaining: Detaining an opponent at any time by holding or pushing against her body, clothing or crosse with an arm, leg, body or crosse. A player may not hold her crosse in such a manner as to restrain or hold back a player.
You have the wrong sport for "boxing out". That's basketball.
Wanted to see Navy win, but the correct call was made. The girl who was "boxing out" as you said was making no play for the ball. Tough way to lose.
