Which baseball position is considered to be among the most demanding defensive positions?

It's subjective, as the explanation states. I would argue 3rd base. This question is too ambiguous for this game.

YSL, I will back off a bit to give you room for your argument and will add one has to play serious b/b to experience how dangerous that position is while even in this fun game. Another definition for S/S is serious stuff. Just kidding. ! ! !

YSL, Second base is just as demanding.

Luckily guessed that one!