What is Graeme McDowell's net worth? Graeme McDowell is an Irish born professional golfer who has a net worth of $12 million and career earnings of over $22 million. Graeme McDowell was born in Portrush, Northern Ireland and turned pro in 2002. His most famous tournament win to date is the 2010 Pebble Beach U.S. open. McDowell has won 8 tour tournaments.