Oakland (2-7) trailed 35-29 early in the second half before going on a 26-5 run capped by Travis Bader's second 3-pointer with 7:47 left in the game.
Until that run, the Grizzlies had been 1 of 15 from 3-point range and Bader had been 0 for 8. Bader's first 3-pointer gave the Grizzlies their first lead of the game at 37-35 with 13:42 left and Oakland never trailed from there.
Bader extended his streak of games with at least one 3-pointer to 62, the longest current streak in the country.
Nick Kellogg led Ohio (6-2) with 18 points but fouled out with 2:26 left. The Bobcats had closed the gap to 53-64, but allowed Oakland to go on a 10-2 run after Kellogg's departure.