FILE - In this Aug. 14, 2004, file photo, Michael Phelps, of the United States, smiles after his win in the 400-meter individual medley at the Olympic Games in Athens, Greece. For the first time since 1996, the U.S. Olympic swimming trials are being held without the sport's biggest star, the guy who won a staggering 23 gold medals and 28 medals overall at the Olympics. (AP Photo/Mark Baker, File)

FILE - In this Aug. 14, 2004, file photo, Michael Phelps, of the United States, reacts after winning the 400-meter individual medley at the Olympic Aquatic Centre during the Olympic Games in Athens. For the first time since 1996, the U.S. Olympic swimming trials are being held without the sport's biggest star, the guy who won a staggering 23 gold medals and 28 medals overall at the Olympics. (AP Photo/Mark Baker, File)

FILE - In this July 7, 2004, file photo, Michael Phelps celebrates after breaking his own world record in the 400-meter individual medley with a time of four minutes, 8.41 seconds at the U.S. Olympic swimming trials in Long Beach, Calif. For the first time since 1996, the U.S. Olympic swimming trials are being held without Phelps, the sport's biggest star, the guy who won a staggering 23 gold medals and 28 medals overall at the Olympics. (AP Photo/Mark J. Terrill, File)

Former olympic swimmer Michael Phelps watches the Phoenix Suns and the Denver Nuggets 118during the first half of Game 2 of an NBA basketball second-round playoff series, Wednesday, June 9, 2021, in Phoenix. (AP Photo/Matt York)