Get a "1,000" rating in any sport. You will see a silver seal next to your name when you play that sport and have the following bonuses unlocked.

Sport	What to unlock
Air Sports	Unknown what happens as of yet.
Archery	Unknown what happens as of yet.
Basketball	Unknown what happens as of yet.
Bowling	Diamond ball.
Canoeing	Unknown what happens as of yet.
Cycling	Unknown what happens as of yet.
Frisbee	Three extra hard holes.
Golf	Three extra hard holes.
Power Cruising	Unknown what happens as of yet.
Swordplay	New samurai armor.
Table Tennis	Unknown what happens as of yet.
Wakeboarding	Two bonus courses.