I've seen every Tiger video you can watch
If you are going to learn from anyone ahead of a US Open at Pebble Beach, Tiger Woods would be the obvious choice following his amazing 15-shot victory in 2000.
But if Woods himself is not about to reveal any secrets as he tries to win the tournament for a fourth time this week, Jason Day and Jon Rahm have found different ways to achieve the next best thing.
For Day that means hiring Woods' former long-time caddie Steve Williams, who was on the bag for 13 of his employers 15 Major titles, while Rahm has been studying footage from the final round 19 years ago, when he was just five years old.
"I think I've underachieved up until now," said world number 16 Day, who reached the top of the rankings in 2015 after winning four tournaments in six starts, including the US PGA Championship at Whistling Straits with a record total of 20 under par.
"I feel like I've got a game that when it's on, I can win most tournaments. And the big thing for me is to go ahead and believe that and have trust in my abilities that I can do that.
"Now that I have Steve on the bag, I think hopefully that will flourish and I can make winning more of a habit.
"He thinks that I'm an underachiever (too). I think that he has the ability to get me through the line a lot more and being able to turn my game around.
"I know that his drive and his will to be successful is very, very high. And I think he's kind of a no BS kind of guy. He'll tell you straight. He told me that if I'm not working hard enough, I'm gone."
Rahm is yet to win a Major title but as well as watching videos of Woods winning in 2000, the 24-year-old picked the brains of Phil Mickelson during a practice round on Tuesday, Mickelson having won the AT&T Pebble Beach Pro-Am for a record-equalling fifth time in February.
"I think I've seen every Tiger Woods video you can watch," Rahm said. "I've seen that Sunday round (in 2000). You see every single shot, it's like 22 minutes, something like that. I've seen it so many times.
"Any time you win a tournament by more than three shots, it's a great performance. Any time you shoot under par in a US Open, it's a great performance; winning by 15 when everybody else is over par.
"It's not like he (Woods) was 18-under-par and the rest were at three, which is still difficult. But to be the only one under par, have a bogey-free final round, there's so many things. It's unique.
"I seriously doubt anybody will be able to do something similar to that again.
"Out of all that Tiger has done, besides his first Major win, to me that is the most impressive performance ever."