In the golden twilight of a perfect Masters Sunday, two little boys sneaked into a prime spot behind the 18th green to catch the end of the tournament. Their dad was practically giddy. "How cool is this, guys?" Matt Kuchar said. Less than an hour earlier he had aced the 16th hole to briefly factor into the unfolding drama. Now Kuchar (who tied for fourth) had come to witness golf’s most unlikely reinvention: Sergio García as a humble, gritty, thoroughly likable champion.