Poor guy (the dog, not you).  Hopefully you are able to find his owner.  I always feel for dogs I see out on the street (usually more than I feel for people out on the street).  But, from the picture you put at the end of the article, I'd say he has a good chance of being taken home from the pound/SPCA within the normal time allotment.  People dig cute puppies!
I do wonder exactly what a retriever/retriever mix is, though?