Jack Nicklaus: "I think this kid's going to have a great career. I don't think there's any question about it. He's got all the components. I like his moxie. I like the way he carries himself. You've got to have confidence in what you're doing. He's got a lot of people rooting for him. He's humble when he needs to be humble and he's confident when he needs to be confident."
Graeme McDowell: "Nothing this kid does ever surprises me. I didn't have a chance to play with Tiger when he was in his real pomp, and this guy is the best I've ever seen, simple as that. He's great for golf. He's a breath of fresh air for the game and perhaps we're ready for golf's next superstar. Maybe Rory is it. He's the best driver of the golf ball I've ever seen."
Luke Donald: "He has probably the most talent I've ever seen from a golfer. Lovely to watch him play, such a fluid motion, and he hits it far. He's not quite dominating the game yet ... But he'll be a tough force to reckon with. He's going to be high on confidence, and he's already got the game to beat anyone."
Padraig Harrington: "Rory has set himself apart now in potential. Sometimes you see a guy run away with a tournament and they're draining putts from all angles. From what I've seen, he's been very comfortable and it's been well within him. It's really been a very easygoing lapping of the field. There might be people capable of winning a major, but there are not too many people capable of dominating and running away from the field in a major."
Phil Mickelson: "He's playing some terrific golf. It's pretty cool. You can tell that Rory has had this type of talent in him for some time now, and to see him putting it together is pretty neat."
Steve Stricker: "He's got the world in front of him. Fundamentally he's as good as we've seen ever in my era, take Tiger Woods out of it. When Tiger was going well, that's as good as I've ever seen. I think Rory is in that same boat. His swing is mechanically sound, he's got a great short game, he putts it well and he's long. He's got all the tools."