Siderowf managed a halve and won the championship on the first hole of sudden death.
Former Ryder Cup captain and PGA Championship winner Hal Sutton credited Siderowf with jump-starting his career, by selecting him to the Walker Cup team in 1979, Sutton's first major international competition.
In 1982, Siderowf attempted to become the first American to win the British Amateur three times.
He reached the fourth round where he played South African Wilhelm Winsnes.
Siderowf, in his words, "hit a lot of dumb shots out there" including a number of missed "short putts."