Claim: Ferdie le Grange's personal best was the South African open marathon on 23 April 1974 where he was the first runner in the world to run two sub 2 hours 20 minutes marathons in one week.
Evidence: His personal best was the South African open marathon on 23 April 1974 when he ran 2 hours 12 minutes. He was the first runner in the world to run two sub 2 hours 20 minutes marathons in one week.