England's Tyrrell Hatton is now up to 17th in the world after going back-to-back, again beating a fast-finishing Ross Fisher.
Haas Wins AT&T National Title
American Bill Haas claimed his first victory since February 2012 with a three-stroke win at the AT&T National at Congressional Country Club.
The 31-year-old carded a 66 finish on 12 under after having had seven previous top-10 finishes in 2013. It was a fifth career success for Haas, one of four overnight leaders.
Roberto Castro was second with world number eight Brandt Snedeker in joint eighth, and closed with a 69, while fellow American Snedeker shot a final round of 71.
South Korean rookie Lee Dong-Hwan made nine birdies in a 64 for his best finish in 18 PGA Tour starts; a share of third with American Jason Kokrak.
2009 Open Champion Stewart Cink was a shot further adrift, while US wonder kid Jordan Spieth was looking to become the youngest winner on the tour since 1931, shot a 69 finish for sixth.
Haas scooped the coveted $10m FedEx Cup in 2011 and his record of winning at least one PGA Tour event in each of the last four years is matched only by Justin Rose, Dustin Johnson and, of course, Phil Mickelson.
AT&T NATIONAL FINAL LEADERBOARD
-12: B Haas (US) -9: R Castro (US) -8: DH Lee (Kor), J Kokrak (US) -7: S Cink (US) -6: J Spieth (US) -5: C Wi (Kor) Selected others -4: B Snedeker (US), B Davis (Eng) -3: A Cabrera (Arg) -1: N Colsaerts (Bel) +1: V Singh (Fij) +4: M Laird (Sco) +5: A Scott (Aus)