Couples recorded a 72-hole total of 17-under par for the 14th win of his career, which was also his second of the year, following his success in the Bob Hope Classic in January.
Couples said he was honoured to have won on the Muirfield Village course designed by Jack Nicklaus, and added: "For me to come back and win Jack's course, Jack's tournament, it means a lot. Next to winning Augusta, I would say this is it for me."
Andrew Magee finished second at 13-under, one stroke better than David Duval. Jim Furyk finished fourth at 11-under, while Brandel Chamblee and the reigning PGA Championship winner Davis Love were another shot back. Ernie Els of South Africa, Tim Herron, Mark Calcavecchia and Ted Tryba all finished at 279, with Nick Faldo on 284, and Tiger Woods four shots further back.Reuse content