Wyndham Clark keeps leaving his mark on Shinnecock Hills. He finished off the lowest opening round in a US Open on this fearsome course Friday morning, and then he delivered two big birdie putts and set the 36-hole standard and build a four-shot lead going into the weekend.

The USGA set up a different course at Shinnecock Hills to handle strong wind Thursday. When the wind subsided later, Wyndham Clark seemed to play a different U.S. Open.

Rory McIlroy was in a larger group on one under but would have been higher had he not bogeyed his final two holes.