Who, if anyone, can catch Dustin Johnson, and other big final-round Masters questions

The attention when this first-ever fall Masters began was on Tiger Woods, who was trying to defend a title won 19 months ago at Augusta National. It also found its way to Bryson DeChambeau, who came into the year's final major with a plan to try to overpower the place. And, of course, there some notice paid to Rory McIlroy who came to this patron-less event in search the last piece of the career grand slam.

Well, all eyes are on now on Dustin Johnson, who will start Sunday's final round with a 4-stroke lead, with the all-time Masters scoring record in sight and his first green jacket within reach.