Background
Jaap was born in Scotland, but moved to the United States with his family when he was a child.
Jaap was born in Scotland, but moved to the United States with his family when he was a child.
He played seven seasons in the American Soccer League and one with Hearts. His family settled in Pittsburgh where he grew up playing soccer from a young age. He began his career in 1912 with a series of amateur and semi-professional teams in the Pittsburgh area.
In 1921, he moved to Philadelphia Field Club of the first division American Soccer League.
His first game came on February 13, 1922, a 5-2 victory over the Fall River Marksmen. Jaap played seven games with Philadelphia, but returned to the minor leagues for several years.
In September 1925, Bethlehem Steel F.C. signed Jaap. Jaap remained with Bethlehem until it folded in 1930.
After Bethlehem Steel folded, Jaap moved to Scotland for one season with Hearts F.C. He was back in the United States with the Newark Americans for one season.
After retiring from playing, Jaap became a youth coach. He was inducted into the National Soccer Hall of Fame in 1953.
He is a member of the National Soccer Hall of Fame.