[3] 17 years old, Brostedt won the 1975 District Championship in the Swedish capital of Stockholm.

[4] Three years later, as an invited amateur, Brostedt finished tied 4th at the professional tournament Flygt Open at his home course Viksjö Golf Club north of Stockholm, in June 1978.

In January 1983, he became the first Swede to play in a tournament on the PGA Tour, after qualifying for the 1983 Phoenix Open.

[3] In 1993 Brostedt won the annual Swedish Married Couple Championship, a 36-hole foursome held in Sunne, with his wife at the time, Charlotte Montgomery, who herself was a professional golfer and played on the LPGA Tour 1982–1987.

He finished ninth in the Q-School and joined the European Senior Tour in 2009, where he made 7 cuts in 8 starts.