In addition to a previously announced headliner between John Salter and Josh Samman, June’s Xtreme Fighting Championship 18: Music City Mayhem event features six additional fights on the evening’s HDNet-broadcast main card. XFC officials recently announced the lineup also includes Scott Barrett vs. Gabriel Salinas Jones, Sofia Bagherdai vs. Heather Jo Clark, Luke Sanders vs. Chris Wright, Jason Blackford vs. Donny Wallace, Scott Holtzman vs. Matt Metts and Joe Ray vs. Dustin West. XFC 18 takes p…