He said the accident occurred in one of 14 elevator shafts at the stadium site but that the circumstances remain under investigation. The worker's name has not yet been released.
"We have 1,000 employees a day working there and we have very few accidents, especially serious ones," Rayborn said. "We can't describe our sadness. This is such a tragedy." He said the California Division of Occupational Safety and Health is investigating the accident.
In the meantime, work on the stadium has been stopped and workers have been sent home. Project co-director Jonathan Harvey said it is not clear when work will resume, but that the site is shut down at least for the day.
Harvey said safety is the company's primary concern.
"We will never put a worker in a hazardous situation," he said.
A statement released by Turner-Devcon this morning read, "We are deeply saddened to confirm that a worker died this morning while working on the stadium construction site. Our thoughts and prayers go out to his family during this very difficult time."
The statement said that in addition to Cal/OSHA, the Santa Clara police and fire departments are looking into the accident, and that Turner-Devcon will also conduct its own investigation.
Grief counselors will be made available to friends and coworkers of the victim in the coming days and weeks, according to the company.
Santa Clara city spokesman Dan Beerman said word of the death has sent a shock wave through the city.
"Everybody's walking around here in a daze," he said.