A seven-hour rain delay hampered the opening round of the Genesis Open in California but Jordan Spieth made the most of his 12 holes, ending Thursday in a tie for the lead on five-under.
Only 72 players were able to start their rounds after heavy downpours left the course unplayable and Spieth had managed five unanswered birdies - twice chipping in - to end a stop-start day in joint first alongside Sung Kang, who had played 14.
The duo are a shot ahead of Patrick Rodgers (13) and Jimmy Walker (10) although Dustin Johnson may wish the entire day was wiped out after playing his first 13 holes in two-over.
The tournament actually started on time at 06:40 local but 50 minutes later the horn sounded for a suspension. With conditions worsening, PGA Tour officials made the surprise decision to wipe out what had already gone before and reset the leaderboard. This, despite eight players sitting at one-under, suggesting the conditions hadn't been unfair.
Spieth and the rest of the morning wave will complete their rounds early on Friday but won't return to the course until Saturday to play their next 18 holes.
Thursday's original afternoon wave will play their opening round on Friday and hope to get in as much of their second laps as is possible although there's a fair chance that the tournament will now have to be finished on Monday.
"My score doesn't reflect how I've played," said Spieth. "It's certainly better than the way I struck the ball. That's what happens when you get a couple of chip-ins - you score well. I just want to cap it off tomorrow now."
Joint-leader Kang got to five-under with the help of an eagle at the 11th after he holed out from 35 yards and the South Korean said afterwards: "I just scored well. I didn't hit any miss shots today."
Spieth is 1000/1 to win the Genesis Open, with Justin Thomas 20/1, Rory McIlroy 500/1 and Tony Finau 2000/1. Finau is three-under while Thomas and McIlroy have yet to start.
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