Reynolds was born in
Akron, Ohio, and attended
Archbishop Hoban High School. His brother
Jeff Reynolds was also a professional sprinter. On 17 August 1988, aged 24 years and 70 days, he set a 400-meter
world record with 43.29 seconds, smashing
Lee Evans's nearly 20-year-old 1968
world record by 0.57 seconds. Reynolds's record had negative splits, meaning that the second half of the race was completed more quickly than the first half, and was the first time anyone had set a world record for the men's 400 meters with
negative splits. His splits were 21.9 seconds for the opening 200 meters and 21.4 seconds for the closing 200 meters, giving a differential of -0.5 seconds. This record stood for 11 years, 9 days and was broken by
Michael Johnson (43.18) in August 1999;
Wayde van Niekerk broke Michael Johnson's record in 2016 in a time of 43.03. , over 37 years after running 43.29, in addition to holding the third fastest time ever, he is one of only 8 athletes to run a sub-43.50 race. He won a silver medal in the
1988 Summer Olympics in the 400 meters and a gold medal in the
4 × 400 m relay. In the
IAAF World Championships in Athletics he won a bronze medal in
1987, and silver medals in
1993 and
1995. He also won gold medals on the 4 × 400 meter relays in
1987,
1993 and
1995. The 1993 World Championship team with
Andrew Valmon, Watts and Johnson still holds the world record for the relay. In the 1996 American
Olympic trials he finished second behind
Michael Johnson, clocking 43.91, the fastest non-winning 400 meters performance until 26 August 2015. However, in the
1996 Summer Olympics semi-final, he suffered a hamstring injury, failed to qualify for the final, and also had to withdraw from the relay team. He retired after the 1999 season. Reynolds has since established the Butch Reynolds Care for Kids Foundation and was the speed coach for the
Ohio State University football team up until his resignation in April 2008. Butch resumed coaching when he was hired as the sprint coach for
Ohio Dominican University in Columbus in 2014. His first season as coach led to an improvement of 20 points at the
GLIAC Outdoor Meet and the emergence of one of the best young sprinters in the GLIAC. Butch left Ohio Dominican after the 2018 outdoor season. ==Drug suspension==