Tags: Swimmer.
Peter Jeffrey Marshall (born March 9 1982) is an American swimmer who specializes in the backstroke. He is the current world record holder in the 50-meter backstroke (short course) and former world record holder in the 100-meter backstroke (short course).He has won a total of fourteen medals in major international competition ten golds two silvers and two bronze spanning the World Championships the Pan American Games and the Pan Pacific Championships.