Yep. Congaree and Kona Gold both had 10

Evening Attire?

I want to say Commentator but he's too obvious and he raced so sporadically.

Congaree is a surprise.

Ok. Trivia Question number 2.

Six female horses had 10 or more North American Graded Stakes wins this decade. Name them.

Ashado, Azeri, and Zenyatta are three of them.

NT

Xtra Heat?

Yep and Yep.

That leaves 4. Of which 3 are pretty obvious.

Azeri 14, Zenyatta 11

Frankel and Laura have 2 for sure.

I edited to include the gimmies Azeri and Zenyatta.

NT

Sightseek

I think it's the other one.

McDynamo the awesome steeplechaser won 10 graded NA stakes in this decade... including 5 Breeders Cups.

You guys have the 5 obvious ones. The one that remains isn't hard - but wasn't obvious to me.

CajunGator?

Wait A While?

Yep - Wait A While.

Megahertz was a neck, a head, a nose, 3/4 of a length, a length, a DQ, and an ungraded American Oaks away from having 10.

I remember her because Wait a While had a crush on me.. think it was the bbq stained t-shirt she actually had a crush on.

You have to edit to include McDynamo in the 10 NA graded male winners.