Golf-World Challenge winners

Dec 8 (Reuters) - Winners of the Northwestern Mutual World Challenge since it was first held in 1999. Zach Johnson won this year's tournament in a playoff with fellow American Tiger Woods at Sherwood Country Club in Thousand Oaks, California on Sunday (U.S. unless stated): 2013 Zach Johnson 2012 Graeme McDowell (Northern Ireland) 2011 Tiger Woods 2010 McDowell 2009 Jim Furyk 2008 Vijay Singh (Fiji) 2007 Woods 2006 Woods 2005 Luke Donald (England) 2004 Woods 2003 Davis Love III 2002 Padraig Harrington (Ireland) 2001 Woods 2000 Love 1999 Tom Lehman* *at the Grayhawk Golf Club, Scottsdale, Arizona (Compiled by Mark Lamport-Stokes; Editing by Gene Cherry)