Rio said goodbye to Michael Phelps, whose infant son, Boomer, can finally take those huge earphones off.
Phelps's last swim in the 2016 Olympics—which might be his final Olympic swim ever—was the men's 4x100-meter medley relay. Fittingly, he got a gold-medal send-off as his butterfly, Ryan Murphy's backstroke, Cody Miller's breaststroke and Nathan Adrian's freestyle combined for an Olympic-record time of 3:27.95. Britain won silver and Australia won bronze.
That's five golds and one silver in Rio for Phelps, 31, who, with 23 gold medals, is the most decorated Olympian in history. He has said he won't be back for Tokyo 2020, per Martin Rogers of USA Today.