Blake is an eight-time Paralympic medalist representing the United States.
In 2011 he won a silver medal in the World Championships 4 × 100 m Relay. In the 2012 Paralympic Games, he won an individual silver medal in the 400-meter T44 event and a bronze medal in the 200m.
He made history by becoming the first double-leg amputee to compete at the USATF National championships. After qualifying for the semifinals with a time of 45.52 seconds in the 400m, Leeper was able to break Oscar Pistorius’ world record in the event with a time of 45.25 seconds the next day.
In 2019 he broke another World Record in the 400m with a time of 44.38 seconds at the USATF National Championships. Making history again by being the first amputee ever qualifying for the national team and world championships.