 As such, races at the Costa Mesa Speedway became standing room only at the weekly events by 1971.Top riders including World Champions with 13 titles between them Ivan Mauger (6 times) and Barry Briggs (4 times) from New Zealand and Ole Olson (3 time WC) from Denmark soon made the trip over to challenge the new American speedway riders.In 1981, Orange County native Bruce Penhall won his first Speedway World Championship at the famous Wembley Stadium in England, becoming the first American to do so since Jack Milne in 1937 (Milne had led an American 1-2-3 in 1937, defeating Wilbur Lamoreaux and his younger brother Cordy Milne).