Donald Roland Trahan (November 13, 1949 – June 21, 2024) was an American PGA Master Professional golf instructor.

The two married in 1973 and moved to Port Orange, Florida where Trahan began his effort to obtain his PGA Tour card.

From there, Trahan took an assistant's job at Sugar Mill Country Club in New Smyrna Beach, Florida and entered into the PGA of America Apprentice Program.

His list of regular students includes a growing number of members of the PGA, LPGA, and other mini tours.

Trahan's passion for helping golfers play better and enjoy the game more resulted in the creation of several training aids and instructional videos.

The February 1998 issue of Senior Golfer Magazine featured a six-page article outlining the results of a study based on Trahan's theory of the short, 3/4 length, limited turn backswing.