William Petersson later changed his name to Björneman and was a long-time official with the IAAF. At Antwerpen in 1920 he won the long jump, the first non-American to win that event, and the only one until 1964. Petersson was a four-time Swedish champion in the long jump (1918-20, 1924) and was the Swedish record holder from 1918-27. During this period he improved the record several times, moving it from 7.20 to 7.39. Like many long jumpers he was also an excellent sprinter, winning a bronze medal with the Swedish team in the 4x100 m relay.
Personal Bests: 100 – 11.0 (1918); LJ – 7.39 (1924).