Both Ryan Moore and Branden Grace were on “59 watch” on Thursday in Las Vegas and in Scotland, respectively, and Isenhour said players tend to realize that they have a chance to shoot 59 and then they put pressure on themselves. Isenhour knows this because he has had the chance to shoot 59 in tournament and he was certainly applying more pressure as the round was coming to a close. In the end, he ultimately shot 61 in that tournament.
In his opinion, David Duval’s final round 59 to win the 1999 Humana Challenge is the best of the five rounds of 59 on the PGA TOUR although Al Geiberger’s 59 in the 1977 Fedex St. Jude Classic took place on the most difficult course. Geiberger shot his round at Colonial Country Club in Memphis, Tennessee.