Definitely a cuban they are in my back yard all the time down here in Florida, like another poster said to be sure you can gently take your finger and rub the skin between his eyes. It won't move at all if hes a Cuban their skin is fused to their skull. If he is a Cuban DON'T release him into the wild no matter what they are an invasive species and are destroying other frog populations in Florida.

He is definitely cute! I am new here and don't have much experience with the creatures only yesterday adopting my own little rescue frog like you seem to have done.
http://www.frogforum.net/other-frogs...html#post99066