Complex sentence: Two months after returning from the Athens Olympics he won his second Pennsylvania Golden Gloves Title, thus advancing to the 2004 National Golden Gloves finals in Kansas City, Missouri which he won, all wins via stoppage.
Split into simpler sentences: Two months after returning from the Athens Olympics he won his second Pennsylvania Golden Gloves Title. All wins via the short route, thus advancing to the 2004 National Golden Gloves finals in Kansas, Missouri which he won, all wins via stoppage.