Canadian Taylor Pendrith hit 10 birdies in an opening round of 61 as he took a three-shot lead in the Shriners Children's Open.
His blemish-free round puts him on 10-under-par, clear of a group of 10 players sharing the second spot before darkness forced a suspension of play in Las Vegas with the last few groups still on the course.
FULL LEADERBOARD
On a congested leaderboard, 10 players are on seven-under, including England's Harry Hall who carded an opening 64, three closing birdies following the only bogey of the round on his 15th hole.
Another group of 10 is one stroke further back with nine players, including former Open champion Francesco Molinari, at five-under-par on a congested leaderboard behind Pendrith.
Waterford man Seamus Power hit three birdies, including consecutive efforts on 15 and 16, in a round of 68 to sit seven shots off the lead on three-under.
Tom Kim, looking to complete a hat-trick of wins in the event, fought back from dropping three early shots to shoot a two-under-par 69.
Joel Dahmen, who sits 124th in the race to finish in the top 125 to secure a full PGA Tour card for next season, suffered a major blow when he was penalised four shots for carrying an extra club.
Dahmen discovered he had an extra four iron on the fourth tee and picked up the maximum penalty for carrying more than 14 clubs.
He eventually signed for a five-over-par 76 and sits next to last in the field.
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