The Morris twins scored KU's first 12 points, including Marcus's layup off the opening tip just two seconds into the game, and the Cowboys played from behind all night. The Jayhawks made seven of their first eight shots but Oklahoma State was almost as hot and kept it close for a while.
A basket by Cowboy senior Marshall Moses cut KU's lead to 24-19 with 11:48 left in the first half but then it got ugly in historic Allen Fieldhouse. The Jayhawks went on a 12-0 run over the next six minutes.
Oklahoma State went 0-for-6 from the field, was 0-for-2 from the free-throw line and turned the ball over six times during that six-minute stretch. A Moses tip-in ended the scoring drought with 5:38 on the clock but the Cowboys trailed 36-21. KU closed out the half with a 16-7 run to take an insurmountable 52-28 halftime lead.
Travis Ford's team has now lost four games in a row for the first time in his three years as Oklahoma State's head coach. The Cowboys are now 16-11 overall and 4-9 in Big 12 play.
Moses was sensational in returning to the court after playing sparingly in Saturday night's loss to Texas A&M. The 6-6 senior was ill and only played seven minutes and did not score against the Aggies. He was taken to the OSU locker room in the second half and eventually had to be taken to the hospital emergency room to receive fluids.
But he single-handedly tried to keep the Cowboys in the game against the Jayhawks and the Morris twins. He finished with 27 points on 8 of 11 shooting from the field and made 10 of 13 free throws, and also had six of the Cowboys 25 rebounds.
Backup point guard Reger Dowell was the only other OSU player scoring in double figures with 10 points. Keiton Page, who scored 15 points on 4-of-4 shooting from three-point range in last season's upset of the Jayhawks, was limited to eight points while going 2-of-11, including making just two of eight treys.
Pilgrim finished with four points and four rebounds in 13 minutes of play. He had three fouls at halftime before picking up his fourth not two minutes into the second half and was whistled for No. 5 with 17:41 left to play in the game.
The Cowboys shot 42.9 percent from the field, but without Moses they were just 13 of 38 shooting (34.2 percent) and made just 10 of 18 free throws (55.6 percent).
The Cowboys will look to break the four-game losing skid Saturday afternoon when they host Texas Tech at Gallagher-Iba Arena.