By Mark Lamport-Stokes OAKMONT, Pennsylvania, June 19 (Reuters) - Little-known American Andrew Landry has been living a U.S. Open dream at Oakmont Country Club and he was still pinching himself after he earned a spot in the lead pairing for Sunday's final round. The 28-year-old PGA Tour rookie birdied his last two holes, sinking a 45-foot putt at the par-four last, to card a level-par 70 and finish the weather-delayed third round in a tie for second, four strokes behind pacesetting Irishman Shane Lowry. "Who can't be excited about that?" Landry said of his final-round pairing after posting a three-under total of 207. More...