Andy Neidnig was an outstanding performer for the cross country and track and field programs. He won the IC4A two-mile championship in 1940, and won back-to-back Metropolitan AAU indoor and outdoor mile championships in 1939 and 1940. He also served as a team co-captain, and was a member of Pen & Sword and Guard of Honor societies. He also competed in 30 marathons, including a ninth-place finish at the Boston Marathon in 1938, and set an over-70 record with a 2:57 at New York in 1992.