JOHNNY GOODMAN WAS THE LAST AMATEUR to win the U.S. Open. Goodman won at Olympic Fields in 1933, edging Ralph Guldahl by a stroke. He had already made a name for himself. At the age of 19 Goodman beat Bobby Jones in the first round of the 1929 U.S. Amateur at Pebble Beach. Goodman later won the U.S. Amateur in 1937 and is credited with at least 60 tournament victories, according to Wikipedia.
The son of Lithuanian immigrants and orphaned when he was 14, Goodman grew up poor in Omaha, Nebraska, where today there is a golf course named after him.