Johnson was 9 of 15 from the field, including six 3-pointers. Ja'Michael Brown added 13 points, Allante Holston 10 and Jeremy Combs 13 along with 11 rebounds for his third double-double. The Mean Green (4-7) shot 54.2 percent, making nine 3-pointers.
North Texas never trailed after a Johnson 3-pointer for a 14-11 lead. Another Johnson 3-pointer gave North Texas a 21-point lead and the Mean Green led 45-28 at halftime. Mississippi Valley State made his 1 of 10 3-point attempts in the half.
MVSU never got closer than 13 points in the second half with the Mean Green leading by as many as 27.
Mississippi Valley State (0-13) hasn't played a home game this season.