- Sport: Men’s Basketball
- Years Attended: 1947-1950
- Position: Point Guard
- 1950 Washington Capitals Draft Pick
- 1951 AAU Basketball Championship
- Inducted in 1998
From 1947-1950 Greenbach played point guard for the Broncos traveling all over the United States. Greenbach was inducted into four Basketball Hall of Fames: Santa Clara University, San Mateo County, Menlo Jr. College, and Sequoia High School. After he graduated from SCU, Greenbach was drafted by the Washington Capitals in the 8th round of the 1950 NBA Draft. That same year he was selected to play with the Stewart Chevrolet Basketball team coached by Hank Luisetti. Competing against 50 AAU teams with the nations top athletes, Greenbach and teammates won the 1951 AAU Basketball Championship. His team missed playing in the Helsinki Olympics by the loss of just one game. Greenbach was selected to play with the AAU All Stars on a national and international tour.