As Mike says, seems to me it's just easier to do it the same way every time.
"Infield fly . . . " (wait, should I say "if fair?" He has two strikes, doesn't he? Wait, does this league have a courtesy foul or not . . . no, it doesn't . . . better just sneak a look at my indicounteclicker . . . )
{all hell breaks loose on the field while I'm not looking; the ball is touched near the line and gets thrown around the field twelve times}
(Ah, well, at least I didn't say "if fair" when I didn't need to.)