In one of the fastest 100 - meter race in Olympic history Miller won at the 1968 Mexico City silver behind Jim Hines. In the 4 x 100 - meter relay, he came up with the Jamaican team to fourth place.
Again silver over 100 meters, he won in 1970 at the British Commonwealth Games in Edinburgh behind compatriot Donald Quarrie. With Quarrie together he won the 4 x 100 - meter relay
Two years later at the Olympic Games in Munich a bronze medal over 100 m, behind Valery Borzov from the Soviet Union and Robert Taylor from the USA.
Lennox Miller was 1.83 m tall and weighed 79 kg in his playing days. In 1973, he completed a degree in dentistry at the University of Southern California. Until shortly before his death, he then worked as a dentist in Pasadena. Miller died of cancer at the age of 58 years.
Inger Miller, one of his daughters, was a sprinter also world class.