STILLWATER, Oklahoma (Ticker) -- Tony Allen scored 18 points and Joey Graham had all 13 of his in the first half as 24th-ranked Oklahoma State rolled to a 90-62 victory over Northwestern State in the season opener for both teams.
The Cowboys had little trouble continuing their home-court dominance over non-conference opponents. They have won 29 straight home games against teams from outside the Big 12 Conference.
Allen opened the game with consecutive baskets and had six of the first eight points for Oklahoma State (1-0), which started with a 20-9 run and never looked back.
Graham made 4-of-7 shots in the first half, capping it with a layup at the buzzer to give the Cowboys a 51-41 halftime advantage.
Ivan McFarlin scored 15 points on 7-of-10 shooting and Janavor Weatherspoon made all six of his shots en route to 13 for Oklahoma State, which shot 61 percent (36-of-59) from the floor.
"Tonight is one of the nights I felt like I could make all my shots," Weatherspoon said. "This year, I just come out and play a lot more aggressive on defense and offense."
Reserve Stephen Graham - twin brother of Joey - scored 12 points as the Cowboys got 46 points from their bench.
"When you have that kind of depth, it's a good thing because there are nights when players have bad nights and somebody has to step up," Oklahoma State coach Eddie Sutton said. "Hopefully, that is the way it will be all season long."
Oklahoma State remained unbeaten in five all-time meetings with Northwestern State.
Jermaine Wallace scored 14 points and Clifton Lee added 12 and eight rebounds for the Demons (0-1), who were held to 40 percent (22-of-55) shooting and committed 27 turnovers.
"I thought turnovers were a key factor in the first half," Northwestern State coach Mike McConathy said. "That was a major factor. We just didn't play very smart at times."