SCOTTSDALE, AZ - JANUARY 30: Michael Phelps walks to his ball on the 18th hole during the Wednesday Pro-Am of the Waste Management Phoenix Open at TPC Scottsdale on January 30, 2013 in Scottsdale, ... more 

SCOTTSDALE, AZ - JANUARY 30: Michael Phelps walks to his ball on the 18th hole during the Wednesday Pro-Am of the Waste Management Phoenix Open at TPC Scottsdale on January 30, 2013 in Scottsdale, Arizona. (Photo by Hunter Martin/Getty Images) less