In 1964, Schlee turned pro. He took club pro jobs after college, and in 1965 was medalist at the inaugural PGA Tour Qualifying School. He was the 1966 PGA Tour Rookie-of-the-Year making the cut in 13 events and finishing 48th on the money list.[1][2]
Schlee was forced into part-time play on the PGA Tour in the mid-1970s due to a series of health problems starting with back surgery in 1975 and followed by knee surgery in 1976. Schlee took a club pro job in Rancho Viejo, Texas in June 1977 after his third serious ailment in as many years, a painful injury to his left thumb.[2] His last appearance was at the Danny Thomas Memphis Classic in 1978.[1]
In 1980, Schlee began a teaching pro career at Industry Hills Golf Resort, east of Los Angeles, California. He also invented devices to help students of the game learn. In 1986, Schlee wrote a book, Maximum Golf, which was a collection of his instructional theories and a tribute to his mentor, Ben Hogan.
After reaching the age of 50 in 1989, Schlee played in a few dozen Senior PGA Tour events but never came close to winning an event. His best finish in this venue was a T-42. Schlee lived in Texas during most of his regular career years and in California during his senior career years.