FILE - In this July 13, 2017 file photo, retired Olympic swimmer Michael Phelps arrives at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion in Los Angeles. Phelps lost to a shark in the Discovery Channel’s Shark Week special “Phelps vs. Shark: Great Gold vs. Great White," which aired on July 23, 2017. It was billed as a race between Phelps and the predator but much to the disappointment of some Twitter users, Phelps didn’t actually swim in the water next to the shark.(Photo by Richard Shotwell/Invision/AP, File)
Olympic champion Michael Phelps has announced his intention to retire after the London Olympics.