Mark Hume McCormack (November 6, 1930 – May 16, 2003) was an American lawyer, sports agent and writer. He was the founder and chairman of International Management Group, now IMG, an international management organization serving sports figures and celebrities.
McCormack was the only son of Chicago publisher Ned McCormack. He graduated from the College of William & Mary in 1951. He earned his law degree from Yale Law School, and served in the United States Army. He played varsity golf at William and Mary, and qualified for the 1958 U.S. Open, but missed the cut.
After his Army discharge, McCormack worked as an attorney at the Cleveland law firm, Arter & Hadden. In the 1950s he helped organize one-day golf exhibitions for professionals around the United States. In 1960, McCormack signed golfer Arnold Palmer as IMG's first client and later signed Jack Nicklaus and Gary Player. McCormack's clients eventually included Fran Tarkenton,Björn Borg, Chris Evert, Pete Sampras, Michael Schumacher, Derek Jeter, Charles Barkley and model Kate Moss. He also handled special projects for Margaret Thatcher, Mikhail Gorbachev, Pope John Paul II and Tiger Woods.
Mark McCormack (born 30 December 1974 in Dublin) is a former Irish football player.
He joined Shamrock Rovers from Stella Maris in 1993 and made his debut on the 3rd of April 1994 as Rovers sealed their 15th League Championship .
He made 1 appearance for the Hoops in the UEFA Cup in 1994.
Currently he is the Under 8 A and Nursery Coach for Corduff F.C. His first cousin is Mick Lawlor (footballer).
Mark McCormack (born September 15, 1970, Plymouth, Massachusetts) is a professional cyclo-cross and road bicycle racer from the United States. McCormack became the first rider to hold the U.S. national championship in cyclocross and road bicycle racing in a career.