OAKMONT, Pennsylvania :J.J. Spaun could not escape the talk about how punishing a setup Oakmont Country Club is, and while that left him plenty nervous, the unheralded American felt the threat of danger at every turn helped power him to the first-round U.S. Open lead on Thursday. Spaun, three years removed from his lone win on the PGA Tour, did not just outplay the game's biggest stars in the opening round of the year's third major but carded only the eighth bogey-free round in a U.S. Open at