In 1995, Michael Phelps recorded the fastest 100-meter butterfly in his age group, but another 10-year-old clocked the fastest time in six other events - NBA player Kris Humphries.
According to ESPN.com, Humphries set six swimming records in his age group: 200-meter individual medley, 100-meter freestyle, 50-meter butterfly, 50-meter backstroke, 50-meter breaststroke and 50-meter freestyle. NBA.com notes that Humphries also was in the top 10 in all nine race categories.
He also beat other notable Olympians, including Ryan Lochte and Michael Cavic.