Caeleb Dressel: The Olympic swimmer's career in pictures

August 1, 2021: Caeleb Dressel (USA) celebrates after winning the men's 4x100m medley final during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre.

August 1, 2021: Caeleb Dressel (USA) in the men's 4x100m medley final during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre.

July 31: Caeleb Dressel with his gold medal at the medals ceremony for the men's 100-meter butterfly.

July 31, 2021: Caeleb Dressel (USA) competes in the men's 100m butterfly final during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre.

July 31, 2021: Caeleb Dressel (USA) cools down after winning the men's 50 freestyle semifinal during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre.

July 31, 2021: Caeleb Dressel (USA) reacts after winning the men's 100m butterfly final during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre.

Caeleb Dressel (USA) with his gold medal during the medals ceremony for the men's 100m butterfly during the Tokyo 2020 Olympics.

Caeleb Dressel, left, and Kristof Milak of Hungary celebrate after finishing first and second in the men's 100 butterfly final during the Tokyo 2020 Olympics on July 31.

Caeleb Dressel won his second individual gold medal at the Tokyo Olympics, the 100 fly.

Caeleb Dressel dives into the water at the start of the men's 50 freestyle semifinal during the Tokyo 2020 Olympics on July 31.

Caeleb Dressel (USA) in the men's 100m butterfly semifinals during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre on Jul 30, 2021.

Caeleb Dressel (USA) during the medals ceremony for the men's 100m freestyle during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre on Jul 29, 2021.

Caeleb Dressel (USA) celebrates after winning the men's 100m freestyle final during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre on Jul 29, 2021.

Caeleb Dressel (USA) shakes hands with Alessandro Miressi (ITA) after the men's 100m freestyle semifinal during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre on Jul 28, 2021.

Caeleb Dressel (USA) after the men's 100m freestyle heats during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre on July 27, 2021.

From left, Bowen Becker (USA), Blake Pieroni (USA) and Caeleb Dressel (USA) celebrate after winning the men's 4x100m freestyle relay final during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre on July 26, 2021.

Zach Apple (USA) celebrates with Caeleb Dressel (USA) after winning the men's 4x100m freestyle relay final during the Tokyo 2020 Olympic Summer Games at Tokyo Aquatics Centre on July 26, 2021.

Caeleb Dressel celebrates after winning the men's 50m freestyle final during the U.S. Olympic Team Trials Swimming competition at CHI Health Center Omaha on June 20, 2021.

Caeleb Dressel of the United States reacts after setting an American Record in the Men's 50m freestyle final during Day Eight of the 2021 U.S. Olympic Team Swimming Trials at CHI Health Center on June 20, 2021 in Omaha, Nebraska.

Caeleb Dressel and Michael Andrew of the United States reacts after competing in the Men's 50m freestyle final where Dressel set a new American Record during Day Eight of the 2021 U.S. Olympic Team Swimming Trials at CHI Health Center on June 20, 2021 in Omaha, Nebraska.

Caeleb Dressel of the United States reacts after competing in a preliminary heat for the MenÕs 100m butterfly during Day Six of the 2021 U.S. Olympic Team Swimming Trials at CHI Health Center on June 18, 2021 in Omaha, Nebraska.

Caeleb Dressel reacts in the MenÕs 100m Freestyle Finals during the U.S. Olympic Team Trials Swimming competition at CHI Health Center Omaha on June 17, 2021.

Caeleb Dressel of the United States reacts after competing in a preliminary heat for the Men's 100m freestyle during Day Four of the 2021 U.S. Olympic Team Swimming Trials at CHI Health Center on June 16, 2021 in Omaha, Nebraska.

Andrew Seliskar of the United States Luca Urlando of the United States and Caeleb Dressel of the United States compete in a preliminary heat for the Men's 200m freestyle during Day Two of the 2021 U.S. Olympic Team Swimming Trials at CHI Health Center on June 14, 2021 in Omaha, Nebraska.

Caeleb Dressel swims in Men's 200m Freestyle prelims during the U.S. Olympic Team Trials Swimming competition at CHI Health Center Omaha on June 14, 2021.

Dressel poses for a photo in April 2021.

Caleb Dressel competes in the Men's 200 Meter Butterfly Heats on Day Two of the TYR Pro Swim Series at San Antonio on March 4, 2021 in San Antonio, Texas.

Caeleb Dressel receives the Male Athlete award during Golden Goggle Awards on November 24, 2019 in Los Angeles, California.

Caeleb Dressel poses for a portrait during the Team USA Tokyo 2020 Olympic shoot on November 23, 2019 in West Hollywood, California.

Caeleb Dressel of the United States competes in the Men's 50m Freestyle Semifinal on day six of the Gwangju 2019 FINA World Championships at Nambu International Aquatics Centre on July 26, 2019 in Gwangju, South Korea.

Caeleb Dressel prepares for the Men's 100 LC Meter Butterfly finals during the 2018 USA Swimming Phillips 66 National Championships swim meet at William Woollett, Jr. Aquatic Center on July 27, 2018.

Caeleb Dressel reacts to winning the mens 100m butterfly during the 2017 USA Swimming Phillips 66 National Championships at Indiana University Natatorium on June 29, 2017.

Nathan Adrian, Ryan Held, Michael Phelps and Caeleb Dressel celebrate with their gold medals after the men's 4x100m freestyle relay final in the Rio 2016 Summer Olympic Games at Olympic Aquatics Stadium on Aug. 7, 2016.

Michael Phelps and Caeleb Dressel (USA) celebrate after winning the men's 4x100m freestyle relay final in the Rio 2016 Summer Olympic Games at Olympic Aquatics Stadium on Aug. 7, 2016.

Nathan Adrian, Caeleb Dressel, Ryan Held and Anthony Ervin of the United States participate in the medal ceremony for the Men's 100 Meter Freestyle during Day Five of the 2016 U.S. Olympic Team Swimming Trials at CenturyLink Center on June 30, 2016 in Omaha, Nebraska.

Caeleb Dressel celebrates after completing the Men's 100 Meter Freestyle finals in the U.S. Olympic swimming team trials at CenturyLink Center on June 30, 2016.

Caeleb Dressel celebrates winning the men's 100-meter butterfly final during the Phillips 66 National Championships at Northside Swim Center on Aug. 9, 2015.