Waste Management Phoenix Open - Preview Day 3

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Michael Phelps signs autographs on the 18th hole during the Wednesday... News PhotoAutographing,Eighteenth Hole,Golf,Horizontal,Michael Phelps,Phoenix Open,Pro-Am,Scottsdale - Arizona,Signing,Sport,TPC Scottsdale,US PGA Tour,USA,WednesdayPhotographer Collection: Getty Images Sport 2013 Getty ImagesSCOTTSDALE, AZ - JANUARY 30: Michael Phelps signs autographs 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)