Langston Galloway scored 27 points and hit the go-ahead free throw with 4.1 seconds left as Saint Joseph's beat Charlotte 71-70 on Saturday.
Charlotte's Derrio Green heaved a halfcourt shot, but it missed at the buzzer.
The Hawks (9-21, 4-12 Atlantic 10) secured the 12th and final spot in next week's conference tournament.
Charlotte (10-20, 2-14) would have earned the tiebreaker and would have notched the 12th spot with a win, but the 49ers saw their season end on an eight-game losing streak.
Galloway was 6 of 7 from 3-point range and 8 of 11 from the field for the game. He hit 3-pointers on three consecutive possessions early in the second half as the Hawks led by as many as eight. He also converted a four-point play late in the game.
With 10.3 seconds left, Galloway beat Charlotte's fullcourt pressure and was fouled on a drive before his go-ahead free throw.
