Obadele "Oba" Thompson BSS is a Barbados-born former sprinter, lawyer, author, and speaker. He won Barbados's first and only Olympic medal as an independent country by placing third in the 100 metres at the 2000 Sydney Olympics. He is a three-time Olympian, and a finalist at each Olympics. His personal best performances are 9.87 seconds for the 100 m, 19.97 seconds for the 200 metres, and 45.38 seconds for the 400 metres. He has held the indoor 55 metres world record since 1997.
Jeremy Matthew Wariner is a retired American track athlete specializing in the 400 meters. He has won four Olympic medals and six World Championships medals. He is the fourth fastest competitor in the history of the 400 m event with a personal best of 43.45 seconds, behind Wayde van Niekerk, Michael Johnson and Butch Reynolds and the fifth fastest all-time mark when he set it in 2007.
Kerron Stephon Clement is a Trinidadian-born American track and field athlete who competes in the 400-meter hurdles and 400-meter sprint. He held the indoor world record in the 400-meter sprint, having broken Michael Johnson's mark in 2005.
Andrew Rock is an American sprinter who specializes in the 400 meter dash.
David Gillick is an Irish international track and field athlete. He began his education in Our Lady's Boys School and attended St Benildus College secondary school in Kilmacud. He studied at Dublin Institute of Technology before moving to Loughborough University in the United Kingdom to train as a full-time athlete with coach Nick Dakin. Gillick specialises in the 400 metres and he won the European Indoor Championship in 2005 and 2007, as well as the Irish National Outdoor Championship in 2006 and 2007. He set the Irish Indoor record of 45.52 seconds in the 2007 final. The time also beat the Irish outdoor record of 45.58 and was within the Olympic 'A' qualifying standard for the 2008 Games. On 4 July 2009 he ran 44.77 seconds in a race in Madrid to set a new national record. He is also the 2009 Irish national 200 m champion.
Aries Merritt is an American track and field athlete who specializes in the 110 metre hurdles, and currently holds the world record in that event with a time of 12.80 s set on September 7, 2012. He won the gold medal in the 110 metre hurdles at the 2012 Summer Olympics in London.
Lashinda Demus is a retired American hurdler who specialized in the 400 meter hurdles, an event in which she was the 2011 world champion and 2012 Olympic gold medalist, becoming the first woman from the United States to win the Olympic 400 m hurdles title.
LaShawn Merritt is an American track and field athlete who competes in sprinting events, specializing in the 400 metres. He is a former Olympic champion over the distance and his personal best of 43.65 seconds makes him the ninth fastest of all time.
Kirani James is a Grenadian professional sprinter who specializes in the 200 and 400 metres. He won the 400 m at the World Championships in 2011, and the 2012 London Olympics. In the 400 metres, James also won the silver medal at the 2016 Rio Olympics, and bronze medal at the 2020 Tokyo Olympics, thus becoming the first man to earn the full set of three medals in the centennial history of the event. He is Grenada's first and only Olympic medalist.
Deon Minor is an American former track and field athlete who specialized in the 400 meter dash. He won two consecutive gold medals in the relay at the IAAF World Indoor Championships from 1997 to 1999, setting a world record mark of 3:02.83 minutes in the latter competition.
Tony McQuay is an American track and field athlete who specializes in the 400 meters. He is a member of the 2012 and 2016 United States Olympic teams, winning a silver medal in the 4 × 400 m relay in 2012 and a gold in the same event in 2016. He is also a two time World Champion in this event.
Kyle Clemons is an American track and field sprinter who competed collegiately for the Kansas Jayhawks and specializes in the 400-meter dash. He was the 2014 champion at the USA Indoor Track and Field Championships and won a bronze medal at the 2014 IAAF World Indoor Championships. His personal best for the event is 44.79.
Chanelle Price is an American middle-distance runner who specializes in the 800-meter run. She has a personal record of 1:59.10 for the distance. She was the gold medalist at the IAAF World Indoor Championships in 2014.
Kendra "Keni" Harrison is an American hurdler. Harrison held the world record in the women's 100 metres hurdles with a time of 12.20 seconds, set on July 22, 2016 at the London Müller Anniversary Games, breaking the previous world record of 12.21 seconds achieved nearly 28 years earlier by Bulgarian athlete Yordanka Donkova.
Michael Arthur Norman Jr. is an American sprinter. He holds the world best time in the indoor 400 meters at 44.52 seconds. Outdoors, his 43.45, set at the 2019 Mt. SAC Relays is tied as the #4 on the all time list. In 2016, he became the world junior champion in both the 200 meters and 4×100 meter relay. In 2022, he became the world champion in both the 400 meters and 4x400 meter relay.
Christian Coleman is an American professional track and field sprinter who competes in the 100 meters and 200 meters. The 2019 world champion in the 100 meters, he also won gold as part of men's 4 × 100-meter relay. He holds personal bests of 9.76 seconds for the 100 m, which made him the 6th fastest all-time in the history of 100 metres event, and 19.85 for the 200 m. Coleman is the world indoor record holder for the 60 meters with 6.34 seconds. He was the Diamond League champion in 2018 & 2023 and the world number one ranked runner in the men's 100 m for the 2017, 2018 and 2019 seasons.
Rai Benjamin is an American professional hurdler and sprinter specializing in the 400 m and 400 m hurdles. He is the second fastest man in history in the 400 m hurdles with a personal best time of 46.17 s. Benjamin won silver medals at his first Olympic Games in 2021 and at the World Championships in 2019 and 2022 in the men's 400 m hurdles, and gold medals in the 4 × 400 m relay in 2019 and 2021.
Kahmari Montgomery is an American track and field sprinter specializing in the 400 m for Nike. He was the men's 400 m champion at the USA Championships in 2018, and at the NCAA Division I Championships in 2019. He represented the United States in the 4 × 400 m relay at the World U20 Championships in 2016 and at the inaugural Athletics World Cup in 2018, earning gold medals in both competitions.
Jacory Patterson is an American track and field athlete specializing in the sprints. A native of Columbia, South Carolina, he won a gold medal at the 2016 USATF Junior Olympics in the long jump before focusing on sprinting events. Patterson attended Dreher High School in Columbia, where he broke the state record in the 200 m and won a state title in the 400 m.
Britton Wilson is an American track and field athlete specializing in the 400 meters hurdles and 400 meters. She finished fifth in the 400 m hurdles at the 2022 World Athletics Championships, her major championship debut. Wilson is the North American indoor record holder for the 400 m dash with a time of 49.48 seconds, set on March 11, 2023, in Albuquerque.
Democratic Republic of the Congo 
