Whodunnit!?

All right, it’s not quite¬†that kind of mystery, but the Chicago Cubs’ AA affiliate has some kind of secret.

The Tennessee Smokies are teasing something, and it appears to make for a fun mystery:

I can envision that that’s a ferocious mascot face there in the middle (a llama?), but I can’t quite figure the shape of the whole thing. It looks like a turtle, but what’s that thing jutting out to the side? And why is the face where the face is?* Hooray mysteries!

*(I actually have some thoughts on possible answers to those questions, based in part on the language in the tweet … but where’s the fun in me just blurting it out?)