Butch Harmon is a former professional golf player who is best known for having been Tiger Woods' golf coach from 1993 to 2004, though they have since gone their separate ways. In April 2007, it was announced that Harmon would start working with Phil Mickelson. He has also worked with other major champions such as Ernie Els, Stewart Cink, Greg Norman, Davis Love III, Fred Couples and Justin Leonard, and with younger stars such as Nick Watney, Rickie Fowler, Adam Scott, Dustin Johnson, Natalie Gulbis, and most recently Jimmy Walker and Brandt Snedeker. Butch Harmon wrote the 2006 book The Pro, describing his life in golf with his father, brothers, friends, and the top players he has coached. Harmon has written golf instructional books under the titles Four Cornerstones of Winning Golf and Butch Harmon's Playing Lessons. He also worked with Greg Norman on his multi-media learning system Greg Norman's Better Golf, which consists of three videos, a book, skill guide cards, and an audio tape; as well as on Greg Norman's book Advanced Golf. Harmon writes a regular monthly instructional column in Golf Digest magazine.