Runner's Intereference/Obstruction

[greymule]

You didn't say what code you were playing under. By man, did you mean "male runners" or just "runners"? "Runner takes the lead as the pitch is being delivered" means this is men's fast pitch? But if it was either FP or SP, in ASA:

If you felt that F3 was the fielder most likely to have a play on the ball, you call INT as soon as the runner contacts F3. In ASA, INT by a runner on a routine fly ball is also an out on the batter.

I must say that your post is difficult to understand ("the 2nd excuse came during a rain delay"). However, in no case can a runner run into a fielder who is fielding a batted ball, regardless of what anyone thinks the runner is "entitled to."

Further, a fielder does not have to be "camped under" a fly ball in order for the IFF to apply. And even if you called IFF, the runner would also be out for contacting F3, unless you felt that F4 was more likely than F3 to be fielding the ball.