Obstruction vs Interference

[rwest]

Originally Posted by CecilOne

#2. Interference. F3 was in the act from the moment she reacted to the direction of the ball (common sense, not book).
#3. Also Interference.

"Does F3 have to get out of the way if she has time to get to the ball and still make a play or can she stand in the base line on a slow roller like I've described? " no, yes

"If the defense and offense arrive at the same point in the base line/base path at the same time, do we have obstruction, interference or a live ball train wreck?" If fielder is fielding a batted ball or in possession, intereference or just a tag out. If not those, obstruction if the runner's path is altered or if NFHS.

So you place the responsibility on the runner to avoid the defense whenever they are in the act of fielding the ball, regardless of how far away the ball is or how fast the ball is traveling? In my original play where F3 was in the base line at the start of the play, do you have interference since the ball was hit down the first base line and F3 reacted to it, even though she didn't move out of R1's way?

Thanks!