It's strange, Moon River came out in 1961, but Sam died in the 20s or 30s. I wonder if this is purely for artistic reasons or if it has something to do with the whole time shiz buiz going on with Virgil and the others. Or, maybe I'm just stupid and Moon River was actually written long ago.
348 days ago(+1)
It could be another version of Sam from an alternate timeline if things were very different for him. Either that or his spirit/ghost in the afterlife.