Defending U.S. Open champion Bryson DeChambeau will not see the weekend at Oakmont, but several of his LIV Golf comrades will.

Sam Burns held the second round clubhouse lead at the U.S. Open on Friday as overnight leader J.J. Spaun struggled late at Oakmont Country Club while Rory McIlroy was flirting with the cutline and Bryson DeChambeau looked certain to head home early.

U.S. Open at Oakmont is testing the world's best golfers like few tournaments do. Here's how the cut line works at golf's toughest major.