Career
Neumann began his career with Tennis Borussia Berlin. In 1975, he moved to the United States and signed with the Boston Minutemen of the North American Soccer League. In 1977, he began the season with Team Hawaii.
On July 8, 1977, he moved to the Las Vegas Quicksilvers.
During the off-season, the Quicksilver moved to San Diego and became the San Diego Sockers. He finished his NASL career with the California Surf.