First of all, Ludvig Aberg is a star in the making.The 24-year-old from Sweden has had a remarkable start to his professional golf career. Now, after placing second at the Masters, he holds the 36-hole lead at the U.S. Open, a major that’s already chewed up and spit out some of the best in the game.Aberg will win a major during his career. It might even be this Sunday. But let’s not hand him the trophy just yet. Instead, let’s zero in on five players who can rally this weekend and earn a comeback win at the U.S. Open.For this exercise, I’m looking past the low-hanging fruit of Bryson DeChambeau and Patrick Cantlay, two elite players in a tie for second at 4 under, one shot behind Aberg. Only players 3 under and lower—guys who’d need to close at least a two-shot gap.Rory McIlro…