STILLWATER, Okla. — Stailee Heard had 18 points, 17 rebounds and 10 assists and Oklahoma State routed No. 19 Iowa State 86-58 on Sunday, sending the reeling Cyclones to their fifth consecutive loss.

It was Heard’s first career triple-double and the third in Oklahoma State history. She is averaging 20.8 points over the past four games.

Before Sunday, Iowa State’s losing streak included only one loss by double digits. Oklahoma State’s 13-0 run in the middle of the second quarter put the Cyclones down by 16 points and they never recovered.

Oklahoma State went on to score 30 points in the second period and led 43-21 at halftime. Micah Gray hit three 3-pointers and scored 12 points in the quarter and the Cowgirls shot 61%.

In the third quarter, the Cyclones cut into their 22-point halftime deficit and had it down to 51-35 before Haleigh Timmer scored 10 points in a 15-0 run that made it 66-35 after the third quarter.

Entering the fourth, Audi Crooks and Jada Williams were the only players with more than three points for Iowa State (14-5, 2-5 Big 12). Crooks, the nation’s leading scorer at 27.6 points per game, finished with 15 points and seven rebounds. Williams had 15 points and seven assists, and the Cyclones fell out of the rankings.

Oklahoma St. 86, No. 19 Iowa St. 58

IOWA ST. (14-5) — Harris 1-9 0-0 3, Alisa Williams 2-6 1-1 5, Crooks 6-14 3-4 15, Hare 1-3 0-0 3, Jada Williams 6-13 2-3 15, Taulelei 1-2 0-2 2, Beaty 1-2 0-0 2, Jensen 1-2 0-0 3, Paulk 4-6 0-0 9, Tanke 0-0 0-0 0, Wilson 0-2 1-2 1. TOTALS 23-59 7-12 58.

OKLAHOMA ST. (16-4) — Akot 4-6 1-2 9, Gray 5-9 1-1 15, Stailee Heard 6-15 3-3 18, Timmer 5-11 4-4 16, Whiting 2-6 3-4 9, Egharevba 0-0 0-0 0, Girardi 4-8 0-0 11, Tyla Heard 0-1 0-0 0, Wooten 3-10 2-2 8. TOTALS 29-66 14-16 86.

Iowa St. 8 13 14 23 — 58

Oklahoma St. 13 30 23 20 — 86

3-Point Goals–Iowa St. 5-17 (Jensen 1-1, Paulk 1-2, Hare 1-2, Harris 1-4, J.Williams 1-5, Crooks 0-1, Wilson 0-2), Oklahoma St. 14-37 (Gray 4-7, Girardi 3-7, S.Heard 3-9, Timmer 2-5, Whiting 2-6, T.Heard 0-1, Wooten 0-2). Assists–Iowa St. 11 (J.Williams 7), Oklahoma St. 25 (S.Heard 10). Fouled Out–None. Rebounds–Iowa St. 32 (Crooks 7), Oklahoma St. 42 (S.Heard 17). Total Fouls–Iowa St. 14, Oklahoma St. 19. A–3,941.