UNC Asheville (12-9, 5-3 Big South) made 11 of 15 3-pointers in the first half and cruised.
UNC Asheville doubled Liberty, 36-18, through the first 13 minutes with 12 points from Thomas and Vannatta's 10. The Bulldogs led 51-30 at halftime after having 14 assists on 16 field goals and shooting 67 percent overall. Vannatta tied a career-high with five 3-pointers and scored 19 points. The Flames were just 1 of 10 from distance and shot 35.5 percent.
Scottie James had 19 points for Liberty (12-9, 3-5).
Mannion, who recently reclassified and is ESPN's No.11 overall player in the class of 2019, chose Arizona over Marquette.
He'll fit in with Sean Miller's plans for a faster tempo on offense.
Top recruits are starting to take their official visits, meaning it's time to make some predictions about where they're leaning.