What do Olympic great Michael Phelps, President Bill Clinton and actors Michael J. Fox and Morgan Freeman have in common? Aside from gracing our December cover in a special split-cover issue, they're all avid golfers, and they're all public figures who use their high profiles to help the needy. Here, Golf Digest proudly introduces a new franchise, Game Changers: Golfers Who Give Back. Read more about the charitable work of these four famous amateurs, from helping kids learn to swim to finding a cure for Parkinsons Disease. Plus, discover 20 others golfers who give back, including professional golfers and athletes, entertainers, musicians, politicians and corporate executives.