CNN  —  Jake Knapp joined an elite club on Thursday as he shot the PGA Tour’s 15th sub-60 round ever. The world No. 99 shot a bogey-free 12-under 59 in his opening round at the Cognizant Classic at the PGA National Resort in Florida. His round – composed of 12 birdies and six pars – meant that he ended Thursday’s first round with a four-shot lead over the chasing pack. “It’s just one of those days where everything was kind of clicking,” Knapp said afterwards. Knapp began his round in hot