Castro leads at Sawgrass but McIlroy lurks behind

World number 267 Roberto Castro took a three-shot lead into the second round of the prestigious Players Championship, but a quick glance at the leaderboard put his chances of a first PGA Tour title on Sunday into stark perspective.

Castro carded an eagle and seven birdies in a nine-under-par 63 at Sawgrass to match the course record set by Fred Couples in 1992 and equalled by Greg Norman two years later.