Former two-weight world champion Diego Corrales died on Monday in a Las Vegas motorcycle accident, exactly two years since his finest moment in the ring.
The 29-year-old Californian will be remembered for his epic victory over Mexico's Jose Luis Castillo in 2005.
Corrales dragged himself off the canvas to force a thrilling stoppage victory and claim the WBC and WBO lightweight titles, but lost the rematch.
His final record was 40 wins (33 knockouts) and five defeats.
After the Castillo bouts, Corrales lost his next two fights against Joel Casamayor, in 2006, and again against Joshua Clottey last month.
606: TRIBUTES
Promoter Gary Shaw said: "I am proud to have promoted one of the true warriors of the game.
"My heart goes out to his wife and kids. Boxing has lost one of the most exciting fighters in the ring."
Corrales, who had recently bought a racing motorcycle, ran into the back of a car about 10 miles west of the Las Vegas Strip on Monday night.
"He fought recklessly and he lived recklessly," said Shaw. "That was his style."