I have a question for the umpires on this board. What criteria do you use for invoking the infield fly rule. The reason I ask is in a game today (not one of mine) a team had runners on 1st, 2nd and 3rd with one out. A high pop-up was hit to 3rd that should have easily been caught with normal effort. The ump did not invoke the infield fly rule. Long story short, ball dropped and a double play occurred. I have no idea why infield fly was not invoked. Did the ump blow the call or is there some other reason?