Henry Rono of Washington State, the world record holder in the steeplechase, beat three-time defending champion James Munyala of Texas-El Paso by more than 100 yards yesterday despite a sore foot at the NCAA track and field championships at the University of Oregon.

Rono, who intended running the 10,000 meters, steeplechase and 5,000 meters, dropped out of the 10,000 Friday because of a foot injury he suffered a month ago.

He showed little ill effect in winning the steeplechase. Rono took the lead at the half-mile mark and Munyala, a fellow Kenyan, was the only other competitor who tried to stay with him. Rono steadily pulled away to win in a NCAA meet and Hayward Field record time of 8:12.39.

Southern California, a favorite for the team title, led from the beginning to end in winning the 400-meter relay. Auburn was second and Maryland's team of Greg Robertson, Renaldo Nehemiah, Robert Calhoun and Andre Lancaster finished fifth.

UCLA's Mike Tully won the pole vault at 18-1 3/4, then missed three attempts at 18-9 1/4 in an effort to better his world record of 18-8 3/4.

Robert Roggy of Southern Illinois, who set an NCAA meet and Hayward Field javelin record in the trials Thursday with a throw of 293 feet, won his event with a toss of 283-9. Clemson's Stewart Ralph was second at 263-4.

The hometown Oregon fans were on their feet cheering in the 1,500 meters as their hero, Matt Centrowitz, battled the leaders most of the race before faltering and finishing sixth. Steve Scott of the University of California at Irvine was the winnter.