Irons was found dead Tuesday in a hotel room at Dallas-Fort Worth International Airport during a layover en route to his home on Kauai. He was returning from Puerto Rico, where he was to compete in the 2010 Rip Curl Pro Search. He withdrew citing an illness he contracted in Portugal.
Tarrant County Medical Examiner Nizam Peerwani said Wednesday the cause and manner of death are pending due to completion of lab tests, which could take several weeks.
The 32-year-old surfer claimed the world championship in 2002, '03 and '04, and was a four-time winner of the prestigious Vans Triple Crown of Surfing. His wife, Lyndie, is expecting the couple's first child in December.