Dale Douglass and 1991 Champion Jack Nicklaus each birdied the 18th hole in the final round to share second place at 286 .
1991 Champion Jack Nicklaus is irwin 's closest pursuers .
Dale Douglass and 1991 Champion Jack Nicklaus , Irwin 's closest pursuers , each birdied the 18th hole in the final round to share second place at 286 .