Washington made 9 of 11 free throws, including four in the final two minutes. The RedHawks' last nine points came from the line in the final 3:21.
Two baskets by McKnight, a 3-pointer and basket by Moore and a free throw from Washington made up a 10-0 run that gave Miami the lead at 57-50 with 7:26 left. The lead was nine when the RedHawks' string of free throws began.
Logan McLane added 11 points for Miami (5-4).
The Raiders were 10 of 25 from 3-point range but the RedHawks made 23 of 28 free throws to 9 of 16 for Wright State.