For the second time in three years, Dustin Johnson is the WGC-Mexico Championship winner.
Johnson shot a five-under score of 66 in Sunday's fourth round, finishing at 21 under overall for a five-stroke win over Rory McIlroy. Paul Casey, Ian Poulter and Kiradech Aphibarnrat rounded out the top five.
His five-stroke win is the largest in this event since it was called the WGC-American Express Championship and was played in England. Tiger Woods won the 2006 event by eight strokes.
Since it was relocated to Chapultepec, Mexico, in 2017, the event had seen its first two championships decided by a combined one stroke.