Mark Randall McCumber (born September 7, 1951) is an American professional golfer who has played on the PGA Tour and Champions Tour.

He also won the World Cup for the United States in partnership with Ben Crenshaw in 1988.

After turning 50 in 2001, McCumber played on the Champions Tour from 2001 to 2008,[3] but did not win an event in this venue.

McCumber is a member of the American Society of Golf Course Architects.

McCumber is a devout Jehovah's Witnesses who preaches in his spare time.