McCormack, 72, who suffered cardiac arrest Jan. 16 during a visit to a dermatologist, is in a coma. Alistair Johnston of IMG and Bob Kain, president of IMG North and South America, are in charge of the privately-held company while McCormack is incapacitated. They are expected to remain in control if McCormick cannot resume his duties.
McCormack invented the World Ranking of golfers. He developed the ranking as a hobby, but the rankings evolved into the basis of many a tournament's basic entry requirement.
The most important client of the firm remains 72-year-old Arnold Palmer, whom McCormick enlisted with a handshake agreement in 1955. IMG also signed Tiger Woods in 1996.