Filbert Bayi Sanka is a Tanzanian former middle-distance runner who competed throughout the 1970s. He set the world records for 1500 metres in 1974 and the mile in 1975. His world record in the 1500 m was also the Commonwealth Games record until 2022. Filbert Bayi (Tanzania) set the men's mile world record of 3:51.0 in Kingston on May 17, 1975. It stood 3 months, until John Walker's 3:49.4 on August 12, 1975. Wiki link