Play any of the games that have a trophy icon on the the menu button and claim your spot on the leaderboard, including SportsVille leaderboards, Toptracer USA and Global leaderboards. You must be connected with your toptracer account while playing and have to finish the game you are playing to qualify for any leaderboard.
You can check any leaderboard from your Toptracer app, or click on some of SportsVille leaderboards below to see if you are on them.