DeMarcus Gatlin added 12 points and hauled in 11 rebounds, while Kaheem Ransom had 11 points, nine rebounds and five assists for Sam Houston (10-4, 2-0 Southland Conference), which extended its win streak to five.
Leading 32-26 at the break, Sam Houston continued to pull away in the second half and took its biggest lead of the game with a 3-pointer from Jabari Peters that made it 52-38 with 10:10 to go. The Bearkats shot just 36 percent from the floor and went 7 of 24 from long range but held a 54-40 rebounding advantage.
Northwestern State (6-7, 1-1) was held to 31 percent shooting from the field on 70 attempts.
Jalan West led the Demons with 17 points, while Zeek Wooley added 11 and grabbed 10 rebounds.