runner interference??

[ggk]

line drive up the middle, the ball hits F1 in the leg and the ball begins to roll towards the first base foul line. F3 is charging the ball and is just about to field the ball. he is approx 20 ft in front of the bag. the ball is still in fair ground. BR, running in fair territory (outside the running lane) runs over F3 just as F3 is about the field the ball. is F3 protected in this situation? i was told that since the ball deflected off F1 that F3 is no longer protected. is that correct? what about the fact that BR is outside the running lane when contact is made? what are the rulings in FED, NCAA and PRO.

thanks.