Mixed martial arts promotion RIZIN Fighting Federation was in Fukuoka, Japan on Sunday, May 6, to host another exciting night of fights. This time around, the promotion featured a stunning first round knockout in the night's highly anticipated headliner. Two former UFC flyweight title challengers made their way into the ring for RIZIN FF 10 on Sunday. Headlining the night's event, Ian McCall and Kyoji Horiguchi went toe-to-toe for division dominance. However, the fight did not last long. Horiguchi managed to put his opponent away within the first nine seconds of the fight, making fer a dazzlingly short match up for the Fukuoka crowd. Check out the incredible finish within the video below: Ian McCall is now 13-8 in his illustrious mixed martial arts career, having faced off against some of the toughest and most talented fighters the sport has to offer. For more MMA news click here.