He finished second in the 2010 Senior PGA Championship. Later in the same year he finished runner-up to Bernhard Langer in the U.S. Senior Open. Couples had a one shot lead after 55 holes, but disaster struck on the par 5 2nd hole. He decided to lay up rather than going for the green. His lay up shot was effective, but his 3rd shot landed in the water. After dropping 4, his 5th shot was driven over the green. He finished the hole with a triple bogey; his one shot lead became a 3 shot deficit. He played solidly for the rest of the round, but could not catch up to Langer.