K.J. Choi birdied the last hole to regain the lead at the Senior British Open, taking a one-shot advantage into the final round at Carnoustie, Scotland. Choi, who was tied with Richard Green before his birdie, had previously built a six-shot lead but faced challenges with consecutive double bogeys. Stephen Ames, who led after the first round, fell back to a tie for sixth after a 2-over 74, while Arjun Atwal sits in third, two strokes behind Choi. Ames cited sluggish play affecting his performance, although he expressed overall satisfaction with his game during the tournament. Padraig Harrington and Peter Lawrie both opened with strong rounds, while defending champion Darren Clarke struggled with a 74. The competition remains tight as players aim for a senior major title.