Career
He competed at the 1924, 1928 and 1932 Summer Olympics in the 110 and 400 m hurdles and 400 m and 4 × 400 m sprint relay (six events in total). Pettersson held two world records, for about a year each, in the 110 m (1927–1928) and 400 m hurdles (1925–1927). In 1925 he became the first recipient of the Svenska Dagbladet Gold Meda