For three days, the Genesis Open was shrouded with unknowns, be it the weather, how Arnold Palmer’s grandson would do after leading, or if the golf tour would have a new world No. 1 after almost a year.
When the final round started around noon on a marathon Sunday at Riviera Country Club, there were absolutely no questions left to answer. Dustin Johnson had made sure of that, with a performance that was utterly dominating.
Johnson led by as many nine strokes early in the fourth round. He played the final holes as if he had a large lead and was content to protect it, explaining his final margin of five strokes. He finished at 17 under par.
When Johnson bogeyed the ninth...