Sandhagen was awarded the TKO victory after his opponent failed to reach the fifth round due to a cut.
“Happy for Corey. He is one of the best fighters in our division, and I know that we will cross paths with him in the octagon. Last time I was lucky enough to quickly defeat him, but no two fights are the same.
Song is a dangerous guy and I'm sure he'll be back on the winning track quickly," Sterling tweeted.