Lodewicus Theodorus "Louis" Oosthuizen (/ˈluːi ˈwʊsthaɪzən/; Afrikaans: [ˈlu.i ˈʊəstɦœizən]; born 19 October 1982) is a South African professional golfer who won the 2010 Open Championship. He also holds the distinction of finishing runner-up in all four major championships: the 2012 Masters Tournament losing in a sudden death playoff, the 2015 U.S. Open, the 2015 Open Championship where he was defeated in a four-hole aggregate playoff, and the 2017 PGA Championship. He is the seventh golfer to accomplish this feat, joining Craig Wood, Jack Nicklaus, Arnold Palmer, Tom Watson, Greg Norman, and Phil Mickelson. His highest placing on the Official World Golf Ranking is fourth which he achieved in January 2013.
