I'm thinking Fraxinus americana, check that one and see if it fits.

Those are some pretty sexy crotch shots. Maybe you should have put some bikini bottoms on them first.

That would be good but heres what I thought was funny!

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But being serious now, I think your right. The reason I thought it was a Green ash was because thats what an Arborist told me, whoops!

The leaves dont have wing tips at the base, and after watching a video about White Ash ID, I found that Whites have U shaped leaf scars and Greens generally have D shaped leaf scars.

I'm thinkin these look like U's.

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Heres a good link showing the leaf scar difference between the two.

Now for sure im thinking its White.

http://www.mushroomexpert.com/trees/fraxinus_americana.html

Anyone second the White Ash ID from the leaf scars or if the crotch growth/collars are normal or perhaps a sign of something bad?

"I'm thinking Fraxinus americana"

ditto

You will know by the fall color if you can't determine by leaf scars or trunk appearance. Green ash turn a nondescript yellow and drop very quickly. White ash have a redder and much more attractive fall color.

As for the collars, don't know if it's bad or not, but I have a couple ashes I let grow from stump sprouts that are growing rapidly and producing crotches that look just like the ones in your pic. Mine are green ash, though.

IME, ash trees are prone to splitting and losing limbs in thunderstorms. Quite possibly, this is related to crotches that began like the ones in your picture but I certainly do not know for sure