AUGUSTA, Ga.—The third round of the Masters began with an unprecedented traffic jam atop the leaderboard. It ended with another tight pack of notable names. But instead of all of them knotted up for the lead, they were all wondering: Can anyone catch Dustin Johnson?
Johnson, the world’s No. 1 who has never won here and has a glaring past of blowing late leads in major championships, raced past a crowded group of contenders that included the other top players and plucky challengers. He finished the day at 16-under par, four…
