The final group has made the turn at TPC Summerlin and, at 21 under, Kevin Na has a two-shot lead over Nick Watney. Tim Herron and Paul Goydos are three back with five others at 17 under. Watney briefly tied Na at 19 under with a 6-foot birdie putt on the par-4 7th hole but Na answered with a birdie from inside 4 feet to move back ahead. The 28-year old Na, searching for his first PGA TOUR victory in his 132nd career start, added a birdie on the par-5 9th to reach his current number and head to the back nine in the driver’s seat.