Casey Jarvis leads at 6 under, a shot clear of Sanghun Shin, after one round of the Genesis Championship at Woo Jeong Hills Country Club. The field went out in two waves on Thursday, and the waves did not play alike: the Thursday afternoon half of the field had the course 0.5 strokes easier than the other half. Adjusted for the draw, Casey Jarvis still leads, by 1.0.
Adjusted standings · after round 1
| # | Player | Raw | Adj | Round by round |
|---|---|---|---|---|
| 1 | Casey Jarvis | −6 | −5.7 | |
| 2 | Sanghun Shin | −5 | −4.7 | |
| T3 | Antoine Rozner | −4 | −4.2 | |
| T3 | Mikael Lindberg | −4 | −4.2 | |
| T5↓2 | Niklas Lemke | −4 | −3.7 | |
| T5↓2 | Si Woo Kim | −4 | −3.7 | |
| T5↓2 | Frederic LaCroix | −4 | −3.7 | |
| T8 | Ryan Fox | −3 | −3.2 | |
| T8 | Marcus Kinhult | −3 | −3.2 | |
| T8 | Ryggs Johnston | −3 | −3.2 | |
| 11↓3 | Dan Bradbury | −3 | −2.7 | |
| T12 | Sangyeop Lee | −2 | −2.2 | |
| T12 | Daihan Lee | −2 | −2.2 | |
| T12 | Yuto Katsuragawa | −2 | −2.2 | |
| T12 | Filippo Celli | −2 | −2.2 | |
| T12 | Sam Bairstow | −2 | −2.2 | |
| T17↓5 | Jack Senior | −2 | −1.7 | |
| T17↓5 | Robin Williams | −2 | −1.7 | |
| T17↓5 | Martin Couvra | −2 | −1.7 | |
| T20 | Jaewoong Eom | −1 | −1.2 |
Adjusted: each Thursday and Friday round scored against the players in the same wave that day, then put back on the day's average. Weekend rounds count as played. Raw is the official board.
How the waves played
Field average to par by wave, with the number of players in brackets:
A positive gap means the afternoon played harder. With about 62 players in each wave, a wave's average is uncertain by about 0.4 of a stroke, so gaps smaller than that are not worth reading.
The draw
Everyone in the same half of the draw had the same conditions on the same days, so the leaderboard is really two leaderboards, offset by how kind each half's Thursday turned out:
5 of the adjusted top 10 come from the Thursday afternoon half. Nobody inside the top 10 moves more than four places, so the draw shuffles the order without rewriting it.
How the leaders are doing it
The feed's own counts over one round: birdies or better, bogeys or worse, fairways hit on the par 4s and 5s and greens in regulation.
Casey Jarvis has made 7 birdies or better and 1 bogey or worse, hitting 78% of greens against 65% for the field. Of the top eight, Si Woo Kim has hit the most greens, 94%.
Round 1 in numbers
The field averaged +1.30 to par in round 1. Hole 17 (par 4) played hardest in round 1, averaging 4.33, with 32% of the field making bogey or worse. Hole 5 (par 5) was the easiest, averaging 4.66, with 42% making birdie or better. The low round of the day was Casey Jarvis's 65 (-6).
Round 2
The waves swap for round 2: the morning half goes out in the afternoon. Expect the adjusted gap to move again once those scores are in.
How this is calculated
Each Thursday and Friday round is compared with the average score of the players who went out in the same wave that day, then put back on the day's average, so the adjusted figure reads like a score to par. That removes the weather and the course setup each wave faced. Weekend rounds go off in score order, which puts the best players together late in the day, so splitting them by tee time would mix skill in with the conditions; they count as played. Scores come from the official hole-by-hole scoring. Only players with every round complete are ranked.
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