Steve Stipanovich and Jon Sundvold rallied top-ranked Missouri from a seven-point deficit in the first half to a 59-58 victory over No. 14 Kansas State in a Big Eight game yesterday in Manhattan, Kan.

Stipanovich, a 6-foot-11 center, made nine of 11 shots and scored 20 points. Sundvold scored frequently over the Kansas State zone and had 14. Missouri (18-0, 7-0), the only unbeaten Division I team, is off to its best start in the 76 years it has played basketball.

Missouri shot poorly early in the game and trailed, 20-13, in the first half. Ricky Frazier, the Tigers' leading scorer with a 15.5 average, was held to a season-low six points.

"That's the strength of this team," said Missouri Coach Norm Stewart. "Somebody can be off a game or two and somebody else will pick up for them. All five of our starters have had at least one 20-point night this season and seven of our guys have scored at least 14 in a game."

Missouri led, 57-52, when Kansas State's Ed Nealy fouled out with 1:03 remaining, but Ed Galvao and Tyrone Adams each made two free throws to make it 57-56 with 31 seconds remaining. Stipanovich then dunked off a fullcourt lob from Sundvold with 22 seconds left. Tim Jankovich scored at the buzzer for Kansas State (14-4, 4-2).Oregon State 72, USC 55: Charlie Sitton and Lester Conner scored 16 points apiece, leading eighth-ranked Oregon State to a Pac-10 victory before 11,004 in the Los Angeles Sports Arena.

William Brew had 14 and Danny Evans 10 for the Beavers (8-1 in the Pac-10 and 15-3 overall.