Jalen Jackson added 14 points for the Trojans (9-0). Josh Hagins had 13 points and five assists and Maurius Hill had 11 points and nine rebounds. The team averaged 45.2 percent shooting from the field and 94.4 percent from the line.
Hill hit a jumper to give the Trojans a 20-11 advantage with 9:11 to go in the first half and they stretched it to 37-15 at the break.
Johnson sank a 3-pointer with 14:40 to play in the second half and the Trojans led by at least 20 points after that.