What would be considered a dead ball?

[PJUMP]

Other then the ball leaving the playing field by an erratic throw what else would be considered a dead ball. I believe a runner getting hit by a batted ball is also considered dead ball. What about interference or obstruction? When do you make the call?

DO make the call "dead ball" as soon as it happens or wait for the play to finish out.

What about calling interference or obstruction -when it happens or when the play is over? THANKS


Mike