Wyndham Clark leads the U.S. Open at Shinnecock Hills after rounds played with changing conditions and a delayed start that ends with darkness affecting the schedule. Multiple outlets report Clark is in front by four strokes early in the second round. After taking advantage of favorable late-round conditions, he extends his lead with a one-under second-round performance highlighted by a late birdie at the 18th. One report notes he is even par through his opening five holes of the second round before building momentum. Another outlet says Clark posts the lowest 36-hole score in U.S. Open history at Shinnecock, moving to 133, one under an old record set in 2004 by Phil Mickelson and Shigeki Maruyama. The field remains tightly packed behind him, with former major champions including Xander Schauffele, Matt Fitzpatrick and Collin Morikawa among those making charges. Yahoo Sports reports Clark holds Fitzpatrick and Schauffele on four behind, while Morikawa is another stroke back. The tournament’s early positioning sets up a close contest as the major winners continue to contend near the top.