Kelly Slater added another notch to his surfing belt with a win over the weekend at Nike's US Open of Surfing in Huntington Beach. He's already a 10-time world champ!

The 39-year-old sexy surfer defeated 26-year-old Yadin Nicol from Australia ... proving age ain't nothing but a number! This is the first time since 1996 that Pamela Anderson's ex beau has taken the title.

After all these years, Mr. Slater's still got it. Find out how much Kelly earned for his win ... after the jump.