Brandy Johnson, rebounding from a lackluster third-place showing in the all-around, won the vault and floor exercise yesterday in the individual event finals at the U.S. gymnastics championships in Denver.

Johnson, dethroned as the all-around champion by 14-year-old Kim Zmeskal on Saturday night, overcame Zmeskal's 9.875 score in the floor exercise with a polished, crowd-pleasing 9.900 to become the only multiple winner.

Zmeskal, 4 feet 5, 72 pounds, was runner-up in three of the four women's individual events.

Among the men, Lance Ringnald won the vault and Trent Dimas the parallel bars, and they tied for the gold medal in the day's final event, the horizontal bar.

Bill Roth, who posted the first perfect 10 ever awarded in men's national competition when he dazzled the crowd on the horizontal bar Saturday, fell and later missed his dismount in that event yesterday. He scored an 8.9.

Other event winners: Sandy Woolsey of Tempe, Ariz., on the uneven bars; Elizabeth Okino of Elmhurst, Ill., on the balance beam; Bob Stelter of Burbank, Calif., in the men's floor exercise; Patrick Kirksey of Tucker, Ga., on the pommel horse; and Scott Keswick of Las Vegas, on the still rings.

Meanwhile, the U.S. Gymnastics Federation announced that Bela Karolyi, Stormy Eaton, Ed Burch and Yefim Furman have been selected as coaches for the U.S. gymnastics team, which will compete in the Goodwill Games this summer.