Lars Gösta Haglund was born in Stockholm on May 22, 1940. He came to prominence by winning the gold medal in the men's discus event at the 1965 Summer Universiade in Budapest. He had already represented his country at the 1964 Summer Olympics in Tokyo, Japan, where he had three false tries in the preliminary round. Haglund also won the 1965 British AAA Athletics Championships in 1965. His personal best was 62.86m thrown in 1974.