Chris Kirk's final-round, five-under 66 helped him hold off Billy Horschel to win the Deutsche Bank Championship at TPC Boston on Monday.  Kirk finished the week at 15-under-par and is atop the FedExCup playoff points list heading into the BMW Championship in Colorado.  Horschel finished tied with Geoff Ogilvy and Russell Henley two back.  John Senden and Rory McIlroy were each tied for fifth at 11-under-par.  McIlroy is in second place and 819 points back in the FedExCup standings with Hunter Mahan holding down third.  After the BMW Championship, golfers will head into the final event of the playoffs at the Tour Championship.