With 55-seconds to go in the opening round Gonzalez, 28, scored with a solid left hook to the head, however, he used his shoulder to ram the champion twice and by the end of the 1st, had drawn a warning from Santore.
Between rounds Gonzalez' corner was able to stop the bleeding from the cut but the ex-lightweight champion lost his focus and spent the next few rounds trying to get even with the Russian-born boxer who fights out of Sydney, Australia.
Gonzalez kept his feet but as soon he got inside he planted his skull on the champion's nose.