HUMBLE, TX - APRIL 03: Phil Mickelson shakes hands with his caddie Jim Mackay on the 18th green after winning the Shell Houston Open at Redstone Golf Club on April 3, 2011 in Humble, Texas. (Photo by Michael Cohen/Getty Images)
HUMBLE, TX - APRIL 03: Phil Mickelson shakes hands with his caddie Jim Mackay on the 18th green after winning the Shell Houston Open at Redstone Golf Club on April 3, 2011 in Humble, Texas. (Photo by Michael Cohen/Getty Images)