Oral Roberts (5-5) has a history of knocking off power programs, but never had a shot against the rolling Wildcats.
The Golden Eagles shot 38 percent and leading scorer Warren Niles was frustrated most of the night, turning it over eight times and scoring most of his 22 points after the game was out of reach.
No. 7 Ohio State 65, Winthrop 55 • In Columbus, Ohio, Deshaun Thomas scored 21 points missing nine straight shots at one point and making five in a row at another.
It was the last tuneup for the Buckeyes (9-1) before Saturday's rematch with No. 9 Kansas. The Jayhawks beat them twice last year, once at Allen Fieldhouse and then in the Final Four.
Whether Ohio State was looking past Winthrop (4-5) and ahead to Kansas, or whether the Eagles just played well and the Buckeyes did not, the game was in doubt until Thomas got hot.
No. 9 Kansas 87, Richmond 59 • In Lawrence, Kan., Jeff Withey had 17 points and 13 rebounds, Ben McLemore added 14 points and Kansas used another big first-half run to put away Richmond.
Travis Releford and Naadir Tharpe each added 11 points, and Elijah Johnson had seven assists for the Jayhawks (9-1), who will ride an eight-game win streak into Saturday's showdown at No. 7 Ohio State a rematch of last year's national semifinal won by Kansas.
No. 20 Michigan St. 64, Bowling Green 53 • In Bowling Green, Ohio, Gary Harris and Denzel Valentine scored 12 points apiece to lead Michigan State to a victory over Bowling Green.
Branden Dawson added 10 points for the Spartans (10-2).
Michigan State held Bowling Green (5-5) to just two points over a six-minute stretch in the second half to take control.
No. 25 N.C. State 88, Stanford 79 • In Raleigh, N.C., Lorenzo Brown scored 18 of his season-high 24 points after halftime to help North Carolina State pull away and beat Stanford.
Tuesday's Top 25 basketball scores
• No. 4 Arizona 89, Oral Roberts 64
• No. 7 Ohio State 65, Winthrop 55
• No. 9 Kansas 87, Richmond 59
• No. 18 San Diego State 76, Point Loma Nazarene 49
• No. 20 Michigan State 64, Bowling Green 53
• North Carolina State 88, Stanford 79