|World Aquatics Championships|
|1975 Cali||100 m freestyle|
|1975 Cali||4 × 100 m freestyle relay|
|1975 Cali||4 × 100 m medley relay|
|1977 Sofia||4×100 m freestyle|
|1977 Sofia||100 m freestyle|
Later that year, under the coaching of Jack Nelson, Coan won three gold medals at the 1975 FINA World Championships in Cali, Colombia. He won two as part of the United States 4 x 100 metre freestyle and 4 x 100 metre medley relay teams and won the third in the 100 metre individual freestyle event.
He continued his winning run at the 1975 United States National Swimming Championships, where he won a gold medal in the 100 yards freestyle event.
After graduating from Pine Crest in 1976, Coan attended the University of Tennessee on a swimming scholarship. Here, his dominance in freestyle swimming continued, as he won seven NCAA National Championships, winning the 50 and the 100 freestyle twice. He was also a member of four University of Tennessee 4 x 100 freestyle relay NCAA Championship teams, and won the 200 freestyle. Coan broke four American records while at University of Tennessee - the 50, 100, 200 and the 4x50 freestyle relay. In 1978, his sophomore year, he led the Tennessee Volunteers to the NCAA Championship and was named the university's Athlete of the Year. Coan later coached Pine Crest high school's rival team, Saint Andrews of Boca Raton working with Coach Sid Cassidy.
Coan did not participate in the 1980 Summer Olympics due to the boycott by United States to protest the Soviet invasion of Afghanistan.
Current athlete nephews of Andy are Matthew and Kyle Coan, both raised in Fort Lauderdale and coached by Jack Nelson while combining for 8 state championships while attending the Saint Thomas Aquinas High School. After upper school each respectively received athletic scholarship offers to attend the University of Florida receiving Letterman awards while training for distance freestyles.
- "Coan betters world swim mark". The New York Times. Associated Press. 1975-08-05. p. 18.
- "World Swimming Championships Results". gbrathletics.com. Archived from the original on April 10, 2007. Retrieved 2007-04-14.
- "Pine Crest Athletic Hall of Fame Inductees" (PDF). Pine Crest School. Retrieved 2007-04-14.
- Cohen, Howard (March 20, 2017). "At 17 he swam faster than Mark Spitz for a world record. Andy Coan dies at 59". Miami Herald. Retrieved April 12, 2017.
| Men's 100 metre freestyle world record holder (long course)
August 3, 1975 – August 23, 1975