Torrence, whose mother was born in Peru and has dual citizenship, competed for Peru in the 5,000-meter at the Olympic Games Rio 2016 and finished 15th. Local police said there were no signs of foul play, but the Maricopa County Medical Examiner's office will determine how he died.
Fire crews got the man out of the water and pronounced him dead at the scene.
Growing up in Los Angeles, Torrence graduated from Loyola High School and the University of California-Berkeley before embarking on a pro running career, where he was a mainstay on the track circuit and road mile circuit. He ran professionally for Hoka One One. He signed a professional contract with Nike and went on to win multiple USA titles on the track and on the roads.
Torrence later revealed he had supplied information to authorities following an earlier training stint with Aden, who has coached an array of runners including Ethiopia's Genzebe Dibaba.
Torrence began his career competing for the U.S., and held the national record for the indoor 1000m, which he set in 2014 and still stands. Many took to Twitter to tell stories and share their grief of his passing.
"USATF sends its condolences to the family & friends of American indoor record holder David Torrence". He was also the defending champion, and Merber tweeted that the race will will be renamed in his friend's honor.