Tanner Toolson hit four 3-pointers and scored a game-high 31 points as the Titans improved to 11-0 on the season.
Toolson was 12 for 15 from the field, scoring 22 of his points in the first half.
“Tanner did a great job of taking what the defense gave him,” Union coach Blake Conley said. “We found the hot hand tonight, and that was Tanner.”
Toolson also added seven rebounds.
Houston Combs added 10 points and Ethan Smith and nine for Union.
UNION 72, BELLARMINE PREP 54
UNION (11-0) — Brad Lackey 7, Houston Combs 10, Izaiah Vongnath 0 Ariya Briscoe 2, Josh Reznick 0, Tanner Toolson 31, Alishawaun Taylor 4, Ethan Smith 9, Darien Chase 0, Connor Flanagan 0, Mason Hill 2, Ty McCullum 3, Curtis Youngren 4. Totals 26 (7) 13-14 72.