AUGUSTA, Ga. — If Rory McIlroy wins this Masters, where will he rank among golf’s all-time greats? Specifically, will he break into the top 10 that unofficially serves as the sport’s pantheon? When McIlroy completed the career Grand Slam by winning last year’s Masters, it gave him—at least on my admittedly, undeniably and absolutely subjective list—a powerful boost. I’d had him in the high teens before the victory and raised him to 12th afterward.