MMA Fighting brings you UFC 178 play-by-play and more for the Johnson vs. Cariaso fight card. Tonight's event is headlined by a fight between UFC flyweight champion Demetrious Johnson and Chris Cariaso. This bout is scheduled for five, five-minute rounds. Also appearing on the main card are Donald Cerrone vs. Eddie Alvarez, Dustin Poirier vs. Conor McGregor, Tim Kennedy vs. Yoel Romero and Cat Zingano vs. Amanda Nunes. Tonight's fights take place at the MGM Grand Garden Arena in Las Vegas, Nev.