I found it on my front porch. In California. It has eight legs.It looks dead whatever it is!
Your picture isn't ideal and so its a bit hard to tell. Where did you find it? Southern US? How big is it? How many legs does it have? That might narrow some options down.
If it has eight legs its probably a spider. I won't be much help in figuring out what kind. Common spiders caught in the wild can be tough to ID the species since there hasn't been much research done on them.
If it has six legs it might be a spiney predaceous grasshopper. They're super cool and not uncommon around central/east TX or other southern states. I caught one once at a resort in San Marcos TX...haha.