Well, it is true he may have an owner. But cats aren't to be free roaming (around here) so, I'll just have to see if someone comes looking for him. He was plenty dirty (no mats, though), had fleas and seems thin for his size. And he ate like he hadn't had a regular meal. So, I would say he was not lost just recently.

The vet thinks he is about a year and a half old. He weighed 9 pounds. Tested Negative/Negative.

He also has 1 extra front toe! (1 big mitten, 1 regular front paw)

Columbus's exploring days are over. He's now safely inside!