Norton - Sweden's Henrik Stenson shot a closing five-under 66 to capture the Deutsche Bank Championship and move into first place in the FedExCup playoffs, taking over from Tiger Woods.
Stenson, who won on the PGA tour for the fourth time in his career, finished at 22-under 262 to tie the tournament scoring record at the TPC Boston.
American Steve Stricker finished two shots back in second place.
Canada's Graham DeLaet shot 69 to finish alone in third and Sergio Garcia of Spain shot a two-over 73 to tie for fourth with three Americans, Jordan Spieth (62), Matt Kuchar (66) and Kevin Stadler (68).
The 37-year-old Stenson, from Gothenburg, posted his first win on the PGA Tour since the 2009 Players Championship by rolling in six birdies in a Monday finish.
Stenson finally broke through with a victory after some runner-up performances this season. He finished second at The Open Championship and the World Golf Championships-Bridgestone Invitational followed by a third at the PGA Championship.
Heavy rains all week led to low scores and plenty of delays, including two more on Monday.
Sunday's third round was completed in near darkness after a lengthy weather delay. Some players had started their third rounds, but the long stoppage forced officials to erase that play and have players go out in threesomes of split tees.
Woods stumbled to a two-over 73 Sunday and finished in a tie for 65th. It was his eighth above par score in 36 rounds in this tournament.
Third round leader Garcia has now won just three of the last 11 times in which he owned at least a share of the 54-hole lead.
Leading fourth-round scores on Monday in the $8m Deutsche Bank Championship, second event in the PGA Tour playoffs (USA unless noted, par-71):
262 - Henrik Stenson (SWE) 67-63-66-66
264 - Steve Stricker 66-68-63-67
266 - Graham DeLaet (CAN) 67-68-62-69
267 - Jordan Spieth 67-66-72-62, Matt Kuchar 66-66-69-66, Kevin Stadler 64-71-64-68, Sergio Garcia (ESP) 65-64-65-73
268 - Brian Davis (ENG) 63-72-66-67
269 - Brendon de Jonge (ZIM) 69-65-69-66, Ian Poulter (ENG) 66-68-66-69, Jason Dufner 66-66-66-71, Roberto Castro 65-65-68-71
270 - Jason Day (AUS) 67-67-67-69, Scott Piercy 68-66-67-69, Hunter Mahan 65-70-66-69
271 - Justin Rose (ENG) 70-63-69-69, Chris Kirk 66-71-65-69, Keegan Bradley 69-65-67-70, Marc Leishman (AUS) 70-67-64-70
272 - Ernie Els (RSA) 66-69-68-69, Brendan Steele 67-67-69-69
273 - Daniel Summerhays 68-68-69-68, John Huh 66-71-70-66, Charl Schwartzel (RSA) 67-68-67-71, Kevin Chappell 68-70-64-71, Nicholas Thompson 66-68-67-72