Calvin Smith Jr. won the 400-meter race at the IAAF Melbourne World Challenge on Saturday to add to some family racing history in Australia.
The American finished in 46.25 seconds 28 years after his father won the 100 at the 1985 Australia Games in Melbourne. Calvin Smith Sr. once held the 100 world record and was a two-time 200 world champion.
American sprinter Wallace Spearmon followed up his fourth-place finish in the 100 to win the 200 on Saturday.
The 100 race was supposed to feature former world record holder Asafa Powell, but the Jamaican withdrew because of a left hamstring injury. It was the same ailment that forced him to pull up in the 100 final at last year's London Olympics.