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.

Marchand Opens FINA World Championships With Second-Fastest 400 IM Time in History

Leon Marchand, 21-year-old French swimming star, breaks Michael Phelps' last remaining world record

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

France's Marchand, Australian swim stars lay down Paris Olympic marker

Hours After Breaking Michael Phelps' 21-Year-Old Standing World Record, Leon Marchand Continues to Dominate Worlds With Another Historic Achievement - EssentiallySports

Michael Phelps' Final Individual Swimming Record Broken by 21-Year-Old Leon Marchand, News, Scores, Highlights, Stats, and Rumors

Notes and Numbers From Marchand's Dominant Rookie Season - Arizona State University Athletics

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

Leon Marchand Breaks Michael Phelps' Last Remaining Record