He 's the current UFC flyweight champ and will defend his belt Saturday at UFC on Fox 8 .
Demetrious Johnson has looked as close to unbeatable as anyone since dropping to 125 pounds .
Demetrious Johnson 's the current UFC Demetrious Johnson   and will defend Demetrious Johnson 's belt Saturday at UFC on Fox 8 .
Demetrious Johnson has looked as close to unbeatable as anyone since dropping to 125 pounds .