The Tigers (10-7, 3-0), tied atop the Ivy League standings with Harvard, won their fifth straight game.
Princeton won it from beyond the 3-point arc and at the foul line. Bray was 3 of 3 on 3-pointers. Will Barrett (10 points) and Mack Darrow were each 2 for 3 from long range. The Tigers finished 8 for 11 on treys. Columbia (9-9, 1-3) was 4 of 13.
The score was tied 50-50 midway through the second half. But Hummer, who scored 16 points, was 12 of 14 from the free throw line -- including 7 of 8 in the last 4:28. After Columbia cut it to 69-66, Hummer hit 3 of 4 foul shots in the last 0:08 to ice it.
Maodo Lo led Columbia with 16 points.
The family of former Houston Astros owner Roy Hofheinz wants a court to require the University of Houston to keep his name on the school's basketball arena.
Michigan has hired assistant basketball coaches Billy Donlon and Saddi Washington.
Duke and Cincinnati, 2016 NCAA tournament teams, highlight the eight-team field for the Naismith Memorial Basketball Hall of Fame Tip-Off Tournament.