Lindsay Davenport, Sam Querrey, and other stars help raise over $100,000 for various charities.
The appointment was approved on December 12 and will take effect in January.
The two-time London Olympic gold medalist makes the list of the most searched athletes in 2012.
Lists, lists, and more lists. So why not the 10 to Watch in 2013?
Americans defend their title in the collegiate world team competition, held this year in France December 5-9, 2012.
The Scot's combined achievements at Wimbledon, the Olympics, and the U.S. Open made him the most searched British athlete on Google.
Novak Djokovic has purchased the 2013 supply of a donkey cheese for a chain of restaurants he's opening.