[1][2] He is known for coining the phrase “X-Factor”, observing that the greater the differential between the hips and shoulders at the top of the swing, the more power the golfer can create.

He qualified for ten national club professional events, won the Westchester PGA Championship in the PGA Met Section, and won the National Skins Game held in Palm Springs, California.

[6] McLean was the director of golf at Sunningdale Country Club in Greenville, New York; Quaker Ridge Golf Club in Scarsdale, New York; Tamarisk Country Club in Rancho Mirage, California; Sleepy Hollow CC in Westchester, New York; and The Doral Golf Resort and Spa in Miami, Florida.

He has been the co-host of Golf School on SiriusXM for 6 years and also an analyst for the major championships on Sirius XM PGA Tour Radio.

[7][8] He has taught Tom Kite, Cristie Kerr, Liselotte Neumann, Lexi Thompson, Keegan Bradley, and Gary Woodland, all of whom have won professional major championships.

[9][10] He has worked with Lucy Li, Ben Crenshaw, Curtis Strange, Sergio García, and Gary Player among others.

[11][12] He pioneered the use of video for golf instruction and was one of the first adopters of radar technology used in swing analysis tools like TrackMan.

Sports Illustrated listed The Eight-Step Swing as one of the top golf books of the 20th Century.