Myth #19 - The runner is always safe when hit by a batted ball while touching a base
The bases are in fair territory. A runner is out when hit by a fair batted ball while touching a base, except when hit by an infield-fly or after the ball has passed a fielder and no other fielder had a play on the ball.
If the runner is touching first or third, he/she is not out unless the ball touches him over fair territory. If one foot is on the base and the other is in foul ground and he/she is hit on the foul ground foot, he/she is not out. It is a foul ball. Does this mean that a runner must vacate a base when the ball is about to hit them? No - if the runner can show that they are trying to get out of the way of the fielder and still maintain touch with the bag - and they do not interfere with the fielding of the ball, the runner can maintain touch with the bag. Again, you must have interference in order to call interference.
LL Playing Rules: 5.09(f), 7.08(f)