Jud Logan missed breaking his own American record for the hammer throw today when Modesto Invitational judges ruled the wire on his hammer was one millimeter too long.

Carl Lewis won the 100-meter dash in 9.98 seconds, posting the second-best legal time of his career. Lewis, winner of four gold medals in the 1984 Olympics, returned to the scene of his best official 100, a 9.97 in the 1983 Modesto meet. He won the 100 in 9.99 to gain one of his four gold medals at the 1984 Olympics, and recorded that time on two other occasions last year.

Logan, 25, a former Olympian from Kent State, completed a throw of 255 feet, which broke his previous record by 19 inches.

But officials ruled the wire attached to the 16-pound ball was one millimeter, or 1-25th of an inch, too long. Officials ruled he had won the event, but the distance would not be submitted for a record.

Logan, who made five throws, said the device used to measure the wire appeared to be home-made. "I wish they had used something more scientific," he said.

Last Sunday, Logan broke his own record at the Jesse Owens Track Classic at Ohio State in Columbus with a toss of 253-6.

In the 100-meter dash, the University of Southern California's Darwin Cook was ahead of Lewis with about 30 meters remaining, but was no match for the Olympic champion in the final strides. Cook was second in 10.10.

Another Olympic champion, Roger Kingdom, won the 110-high hurdles in 13.14, a personal best and also a meet record. His previous best was 13.16, and he won the Olympic gold with a 13.20.

Kim Gallagher, silver medalist in the women's 800 at the Olympics, set a meet record by winning in 2:00.85.