In 2008 the rumor was Roger got 10-years at $13m per.
That is lower than Rory, but a lot of what they are paying for is potential.
Part of the appeal for young Rors is that he is popular in Asia. In China the game is expected grow versus the rest of the world.
Why do you think Nike held onto Kobe despite Lebron outselling him in the US? They kept him a focal point because he sold very well in China.
I have read many reports where golf is shrinking, yet tennis also has players exiting every year. Which sport has more growth potential? The one where guys buy one racquet and a few kits? Or the one where they have to buy 14 sticks plus clothes?