Harry Lee "Butch" Reynolds Jr. (born June 8, 1964) is an American former track and field athlete who competed in the 400 meter dash.

He held the world record for the event for 11 years 9 days with his personal best time of 43.29 seconds set in 1988.

He also enjoyed success with the 4×400 meter relay team, winning the world title three times in his career with the United States (1987, 1993 and 1995).

Reynolds remains the third fastest of all-time in the 400 m after Michael Johnson and Wayde van Niekerk, the current world record holder.

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.

The American Olympic trial 400 meters heats were postponed for four days, but the IAAF finally backed down.

Reynolds finished fifth in the trials, and qualified for a place as a substitute on the American 4 x 400 meters relay team.