AUGUSTA, Ga. -- The golf ball sat at the bottom of the left pocket of Wayne Mitchell's green cargo shorts. "I've got a zip on it," Mitchell said of the zipper pulled tight across the pants leg. He might have considered a safety deposit box. Mitchell owned -- for a few hours, at least -- one of the most famous golf balls in Masters history. He got it Sunday afternoon after Louis Oosthuizen double-eagled the par-5 2nd hole, pulled the Titleist from the cup and, incredibly, underhand-tossed it toward the patrons seated behind the green. It landed in the hands...