Angela Said:

Would you want any of these in baseball stadiums?

We Answered:

One- in order to do this, most teams would need to build a brand new stadium, or at least add a retractable roof, both of which are 'very' expensive (tens, if not hundreds, of millions of dollars). I've never even heard of an MLB player suffering from heat strokes before, and rain delays are not much of a problem in most of the country. You would also be ruining classic stadiums like Wrigley, Fenway and Dodger Stadium.
Two- I actually agree with this, somewhat. I mean, I like real grass, but if this 'Sportsgrass' (I may or may not be familiar with it...) looks like the real thing, then, yeah, sure, if it helps a lot.
Three- *Sigh* Grass should be green. OK, if 'one' stadium did it, and it wasn't a garrish color, then, ok. But I 'really' don't want to see yellow, blue, pink, etc. fields.
Four- Kind of seems silly, just wanting there to be a big 'X' in the middle of the field...

Five?- If you mean, 'Several colors within the park,' then no. All foul poles within the park should be the same color. But if you just mean, 'One stadium is yellow, one is green, one is blue, whatever,' then that sounds fine.