Published: Sep 30, 2011 2:16 AM EDT
Updated: Sep 30, 2011 6:30 AM EDT

LAS VEGAS (AP) - Jhonattan Vegas and William McGirt shot 8-under 63s on Thursday to share the first-round lead in the Justin Timberlake Shriners Hospitals for Children Open.

Vegas, the Venezuelan rookie who won the Bob Hope Classic in January for his first PGA Tour title, had 10 birdies and two bogeys at TPC Summerlin in the first of four Fall Series events.

McGirt, also a PGA Tour rookie, had eight birdies in a bogey-free round.

Nathan Green and Charlie Wi were a stroke back.

Jonathan Byrd, the winner last year when he made a hole-in-one on the fourth hole of a three-man playoff, opened with a 71.