UFC Fight Night: Barnett vs. Nelson (also known as UFC Fight Night 75) is a mixed martial arts event held on September 27, 2015 at Saitama Super Arena in Saitama, Japan. The event is headlined by a heavyweight bout between former UFC Heavyweight champion Josh Barnett and The Ultimate Fighter 10 heavyweight winner Roy Nelson. The featherweight final of Road to UFC: Japan, a new UFC reality series that was held in conjunction with the event, is featured on the card. Gegard Mousasi faced Uriah Hall and Kyoji Horiguchi fought Chico Camus.