Brown's three-point play gave Western Carolina a 70-63 lead with 3:21 left. Then Eric Robertson's 3-pointer started a 7-0 Chattanooga run to tie it at 70 with 1:53 left. Hall made the first free throw and missed the second with three seconds left, but Casey Jones missed a 3-pointer at the buzzer.
Justin Tuoyo led Chattanooga (16-9, 9-3) with 17 points and eight rebounds.
Chattanooga trailed 39-25 at halftime, but Tuoyo scored 12 of the Mocs' first 14 points of the second half to pull within 45-39.