(Reuters) - U.S. Open champion Justin Rose recovered from a back-nine stumble to take a two-stroke lead over Jason Dufner after Thursday's opening round of the four-man PGA Grand Slam of Golf in Bermuda. Following bogeys at the 13th and 14th holes, the Briton steadied his ship with an eight-foot par putt on the 15th before making a two-putt birdie at the par-five 17th to post a four-under-par 67 at the Port Royal Golf Course in Southampton. The elite 36-hole event is for the winners of the year's four majors. ... More...