|Full name||Sean Thomas Killion|
|Born||October 24, 1967|
Camden, New Jersey
|Height||6 ft 3 in (1.91 m)|
|Weight||185 lb (84 kg)|
|College team||University of California, Berkeley|
Killion was born in Camden, New Jersey, and spent his early years training at Jersey Wahoos, a club located in Mount Laurel, New Jersey. Growing up in Cherry Hill, New Jersey, Killion swam at Cherry Hill High School East, setting New Jersey State Interscholastic Athletic Association records that have stood for as long as 30 years before he graduated in 1986.
He was a surprise gold medalist in the 1986 Goodwill Games, defeating world record and Olympic gold medalist Vladimir Salnikov, outtouching him at the wall. He claimed the gold medal at the 1991 Pan American Games in the men's 400-meter freestyle event.
Killion represented the United States at the 1992 Summer Olympics in Barcelona, Spain. He competed in the B Final of the men's 400-meter freestyle, and finished with the eleventh-best overall time of 3:52.76. He also recorded a time of 15:27.49 in the preliminary heats of the men's 1,500-meter freestyle, but did not advance.
Killion held the American record in the 800-meter freestyle from July 27, 1987 to August 25, 2002.
- Monostra, Mike. "Throwback Thursday: Cherry Hill native Sean Killion reflects back on Olympics, swimming careerA member of the Camden County Sports Hall of Fame and Cherry Hill East Athletic Hall of Fame, Killion swam for the United States in the 1992 Summer Olympics in Barcelona, Spain.", Cherry Hill Sun, August 18, 2016. Accessed November 30, 2017. "It has been nearly 25 years since Cherry Hill native Sean Killion swam in the 1992 Summer Olympics, yet he remembers it like it was yesterday.... A 1986 graduate from Cherry Hill High School East, Killion set numerous records in both the Tri-County Swimming Pool Association and in high school."
- HickokSports.com, Sports History, Pan American Games Archived 2012-12-05 at Archive.today. Retrieved October 30, 2012.
- Sports-Reference.com, Olympic Sports, Athletes, Sean Killion. Retrieved October 30, 2012.