KANSAS CITY, Missouri (Ticker) -- Ivan McFarlin flexed his muscles and took the fight out of Eastern Washington.
McFarlin scored 20 points on 9-of-11 shooting and grabbed 10 rebounds and Tony Allen added 17 points to lead second-seeded Oklahoma State to a 75-56 victory over the 15th-seeded Eagles in the first round of the East Rutherford Region.
Oklahoma State (28-3) won for the 18th time in its last 19 games and will meet seventh-seeded Memphis Sunday.
Eastern Washington (17-13) played its first NCAA Tournament game since joining Division I in 1984 and was even with the Cowboys, 36-36 at halftime.
"We didn't take them lightly, but we didn't respect them like we should have," McFarlin admitted.
McFarlin and Joey Graham powered inside for two baskets apiece as Oklahoma State started the second half with a 12-2 run, opening a 48-38 lead with 16:01 left.
Eastern Washington pulled within 55-48 on a 3-pointer by Josh Barnard with 8:29 remaining, but Daniel Bobik ignited a 14-2 spurt with a 3-pointer and a jumper. Allen hit a short jumper and converted a pair of free throws in the run as Oklahoma State increased its lead to 69-50 with 4:09 left.
The Cowboys shot 58 percent in the second half, making 15-of-26 shots. After shooting 44 percent in the first half, Eastern Washington made just 7-of-27 shots in the second half.
"They played like a hungry team in the second half," Eastern Washington coach Ray Giacoletti said. "They treated the first possession of the second half like it was the last possession of the game. It really was hard for us to finish plays in the second half."
Allen put the clamps on Eastern Washington's Alvin Snow, the Big Sky Conference Player of the Year who averaged 15.2 points. Snow made just 1-of-10 shots, a meaningless layup with 2:09 left, and finished with two points.
"Tony was sensational on defense," Oklahoma State coach Eddie Sutton said. "Snow is their big scorer and Tony stayed on him all day."
Yet despite virtually no contribution from Snow, the Broncos went toe-to-toe with Oklahoma State in the first half.
The performance of reserve center Gregg Smith was the biggest surprise of all. Averaging just 2.6 points this season, Smith scored 12 in the first half, making all six of his shots.
"Yeah, it surprised us," McFarlin said of Smith's performance. "All I know is that coach told us if we played like we did in the first half then we could be going home. We didn't want to go home."
Smith was not a factor in the second half, scoring four points. Brendon Merritt had 14 points for Eastern Washington, but hit only 4-of-14 shots.
John Lucas played with strep throat and had 15 points, but made just 5-of-17 shots for Oklahoma State.