Roberto Castro is atop the leaderboard after the first day of The PLAYERS Championship.
He tied the course record at TPC Sawgrass with an opening round, nine-under 63.
Making his Players debut, he equaled the mark set by Fred Couples in 1992 and Greg Norman in 1994.
Rory McIlroy and Zach Johnson are tied for second at six-under par.
World number-one Tiger Woods bogeyed his final hole and is tied for fourth at minus-five.
By: Mike Plourde for Great Lakes Radio Sports