RIO DE JANEIRO—Opening up to reporters about the challenging conditions at the Rio Games, U.S. swimmer Ryan Lochte admitted Thursday that the Olympic pool is much wetter than he remembered.

RIO DE JANEIRO—Immediately recognizing the booming, thunderous voice he hadn’t heard since he was 5 years old as he warmed up ahead of his first heat in the 200-meter individual medley, U.S. Olympic swimmer Michael Phelps reportedly spotted his long-estranged father, Poseidon, God of the Sea, cheering for him Thursday in the stands of the Olympic Aquatics Stadium.

MONTREAL—Saying they have received multiple phone calls and emails from the NBC Sports host every day for the past four weeks, members of the World Anti-Doping Agency told reporters Tuesday they were extremely unnerved by Bob Costas’ repeated requests to submit his own urine sample ahead of the 2016 Summer Olympics.