It should be common sense, but...

[MD Longhorn]

Originally Posted by Manny A

Perhaps. But the overwhelming majority of the partners I've had will only take catch/no-catch from F9 to foul territory. Until this particular game, I cannot recall a partner going out on a fly to dead center.

That's not normal... but in any case, it's the PLATE umpire's responsibility to watch BU at the beginning of a fly ball to the outfield to see if he's going out. Many partners will say something if they go out, but that's often not heard anyway. YOU have to watch. If he goes out, he's got the fly ball and you've got, well, what you didn't get.