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Luke Donald, of England, hits to the 12th green during the first round of the Northern Trust Open golf tournament at Riviera Country Club in Los Angeles, Thursday, Feb. 16, 2012. (AP Photo/Chris Carlson)

Haas clinches Riviera in sudden-death playoff

Bill Haas clinched his fourth PGA Tour title by beating fellow Americans Phil Mickelson and Keegan Bradley in a gripping sudden-death playoff for the Northern Trust Open Sunday.