Almond, Peach, or Nectarine. I can't say for sure. Close-ups of the fruit and of the leaves could help others and possibly myself in unraveling the i.d.

Dax

Thanks Dax. Here's what I currently have...a little blurry and not all the right angles. I'll take a better picture this afternoon and upload.

It's something that I can't grow. You'll have to get some help from others on here.

Dax

When the fruit - which so far looks spherical - matures that will tell the tale. Since in both cases (nectarines are merely smooth peaches) the seed is large, can't travel far without being carried the parent tree may be nearby.

Thanks Embothrium. Here are a couple of better pictures of the fruit if that helps. I'll definitely look around for similar trees in the neighboring yards...great suggestion. I'll report back when the fruit is more mature...I'm sure you'll need closure :) Thanks!