Robert Morris 84, Ohio 76
MOON TOWNSHIP, Pa. (AP)
Anderson, who entered the game shooting 38.7 percent from the field, finished with 28 points and was the only Colonial not to commit a foul.
Johnson shot 1 of 6 from the field but his 11 makes from the charity stripe helped him finish with 14 points.
Robert Morris (4-4) led 12-10 before Anderson reeled off four 3-pointers on consecutive possessions to extend the Colonials' lead to 24-10.
Ohio (6-1), which trailed 37-32 at the break, cut the deficit to 77-73 with 1:33 left to play but Anderson hit his eighth 3-pointer of the game to put Robert Morris back up 80-73 and seal the win.
D.J. Cooper led four Ohio players in double-figures with 19.