RIO DE JANEIRO -- Michael Phelps is used to being in a league of his own.
So it was strange to see him crowding onto a medal stand with two other swimmers Friday night.
Phelps rallied from sixth overall at the turn to lock up a silver medal in the men's 100-meter butterfly, but the winningest Olympian of all time finished in a three-way tie for the medal with Chad le Clos and László Cseh.
Meanwhile, Joseph Schooling of Singapore shocked the field by winning gold in Olympic-record time (50.39 seconds). It was the country's first gold medal in any sport.
Schooling, who also swims at the University of Texas, built a big lead on the opening lap and easily held off the hard-charging Phelps.
Schooling -- almost exactly a decade younger than the 31-year-old American -- wouldn't let Phelps pull off one of his patented comebacks on the return lap. The time for the three silver-medal winners was 51.14.
Phelps quickly swam over to congratulate Schooling, who seemed stunned by what he had done.
"Joe is tough. Hats off to him, he swam a great race. It's kind of special and a decent way to finish my last individual race," Phelps said.
"It hasn't really sunk in yet," Schooling said. "I'm sorry if I don't seem like I'm full of emotions right now. I don't know what to believe, like, whether I actually did it or I'm still preparing for my race."
Schooling was equally complimentary of Phelps.
"[Phelps] is a guy that will go down in our history books as the greatest of all time of any sport. I'm just honored and glad to have that moment and that privilege to race alongside Michael and Chad and all those guys," Schooling said.
The three-way tie for the silver medal is the first three-way tie for any medal in Olympic swimming history, according to ESPN Stats & Information.
"A three-way tie is pretty wild," Phelps said.
Phelps now has won five medals over his week in Rio: Friday night's silver and four golds. His career total in the Olympics now stands at 27 medals.
The Baltimore native will close out these Olympics in the 4x100 medley relay Saturday, in which he'll have a shot for his 23rd gold medal.
Earlier Friday, fellow American swimmer Ryan Lochte said he believed Phelps would compete in the 2020 Olympic Games in Tokyo, which Phelps politely contradicted after the 100 butterfly.
"I am not gonna be competing in four years," Phelps said.
Later Friday, 16 years after winning his first individual gold medal at the Olympics, Anthony Ervin picked up his second with a furious dash from one end of the pool to the other.
Completing a remarkable journey in the blink of an eye, the oldest member of the U.S. swimming team touched first in the 50-meter freestyle, edging the defending Olympic champion, Florent Manaudou of France, by a mere hundredth of a second.
Another American, Nathan Adrian, took the bronze.
The 35-year-old Ervin won his first gold at the 2000 Sydney Olympics, tying teammate Gary Hall Jr. for the top spot. He skipped the next two Olympics only to return for the 2012 London Games, but he failed to medal there.
Now, improbably, he's back on top of the podium again.
Information from The Associated Press was used in this report.