There's an adage in sports that says it's tough to make it to the top, but it's even tougher to stay there.
Professional golfers know that as well as anyone. Getting a PGA Tour card is a tough task regardless of what path is taken to do so. Keeping that card is something that takes a lot of work and a lot of good play.
Playing at a high level, however, is what makes the game a job for the best players in the world. When things start going badly, it take a great deal of time and effort to get that mojo back.
Here are 10 guys who could have that hard work pay off with good years in 2013.