Mackenzie Hughes of Canada quietly went about his work with a 9-under 63 on Thursday to lead the Procore Championship. The big crowds followed Scottie Scheffler and the U.S. Ryder Cup team and saw mixed results.

For the longest time, Ryder Cup rookie Ben Griffin wasn't even the low Griffin at Silverado until five birdies on the back nine gave him a 64, one shot behind with Matt McCarty. Russell Henley was at 65 with Lanto Griffin.

Scheffler, who hasn't finished lower than eighth place since March, lost one streak on a breezy afternoon in wine country when he was wild off the tee at the par-5 18th and had to settle for par and a 70. That ended 21 consecutive rounds in the 60s.

Ten Ryder Cup players are here for the competition and to try to stay sharp ahead of Bethpage Black in two weeks

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