Mark Vologdin vs John Castaneda Opening Odds UFC Las Vegas | April 18, 2026 UFC | John Castaneda vs Mark Vologdin UFC Vegas Apex 123 Vegas St 5:45pm | Saturday 18th Apr Fighters Odds John Castaneda -132 Mark Vologdin 109 Past Fight Odds UFC Fight Cards Mark Vologdin Odds Mark Vologdin vs John Castaneda Opening Odds UFC John Castaneda Odds Mark Vologdin vs John Castaneda Opening Odds UFC