Jason Edward Lezak is an American international swimmer who is a four-time Olympic gold medalist. He formerly swam for Irvine Novaquatics. He graduated from Irvine High School in 1994, and then from the University of California, Santa Barbara in 1999. He is a member of the Rose Bowl Aquatics swim club.
Lezak is a specialist in the 50-meter and 100-meter freestyle races. He also owns long-course world records in the 400m freestyle and medley relays, and is a former American record holder in the 100-meter freestyle. Lezak is one of the few elite swimmers not to have a personal coach. Despite this, Lezak enjoys team sports and fellow American Gary Hall, Jr. dubbed Lezak as a "professional relay swimmer" at the 2004 Olympic Trials before their matchup in the 100-meter freestyle.