ump calls infield fly, but it is not

[NCASAUmp]

Originally Posted by CecilOne

Then we have to judge whether the fielder who got the ball would have an out on another runner w/o being fooled by the call. If so, as above, probably judge the defense in jeopardy and count the out. Really tough to guess an out though, so it would have to be real obvious.

I think the last sentence is key here. Anytime you have this kind of a situation, you have to be absolutely DEAD positive if you're ever going to consider calling an out. Even then, I'm extremely hesitant to call an out. I can think of only VERY few situations where I would do so.