Meet Léon Marchand, the French Swimmer Who Broke Phelps' Record

He beat the long-standing record by a smashing 1.34 seconds on Sunday, making him the world record holder in the long course 400m individual medley.

Leon Marchand leads French team into World Aquatics Championships looking to gather momentum ahead of home Olympics

Summer McIntosh held off 400m freestyle podium, Titmus sets new world record

ASU's Léon Marchand preparing for Olympics, Pac-12, NCAA championships

Leon Marchand and Summer McIntosh are sure to star in the pool at Paris Olympics

Marchand smashes Phelps's last remaining world record

Marchand Breaks Phelps' Final Solo World Record

Leon Marchand and Summer McIntosh are sure to star in the pool at Paris Olympics

Léon Marchand is France's new swimming star in perfect timing for Paris Olympics, Olympics

Marchand 4:02.50 WR: Race Video & What He Said After Confining Phelps' 4:03.84 Epic To History - StateOfSwimming

Leon Marchand surpasses Michael Phelps' 200 meter IM Pro Swim Series record

Leon Marchand crushes Michael Phelps' last world record at swimming worlds - NBC Sports

French torpedo Marchand smashes Phelps' 15-year record at worlds

Marchand can handle Paris Olympics pressure

Leon Marchand sets 400 IM record, last individual mark of Michael Phelps - ESPN