A five-time British Open winner at Carnoustie, Turnberry, Royal Troon and Royal Birkdale and the famous Muirfield links, Watson is a contender to win the title for the third time. He also won in 2003 and '05.
"It still burns a lot," Watson said of his hunger for winning titles, especially on links courses. "I said many times the reason I'm out here is to compete."
Ginn shot 69 and stands at 3-under 210. Ginn, an Australian, bogeyed the first two holes but then didn't drop a shot in tricky wind. Former British Open champion Mark O'Meara is three strokes off the lead after shooting 70.
"It's not easy out there and you have to be patient and do the best you can," said Ginn, who won the Senior Players in 2002 but is looking for his first tournament victory in Europe.
LPGA Tour: In Evian-Les-Bains, France, Juli Inkster shot 3-under-par 69 for a two-stroke lead and Michelle Wie ballooned to an 84 after the third round of the Evian Masters. Only seven players broke par.
The 47-year-old Inkster is trying to become the oldest player to win an LPGA event. She finished at 6-under 210.
The 17-year-old Wie had the worst round of the day, shooting 12-over par to languish in 69th place. She had four double bogeys, five bogeys and one birdie in her round.
EUROPEAN PGA: In Alveslohe, Germany, Andres Romero shot 9-under-par 63 to take a two-stroke lead after three rounds of the Deutsche Bank Players Championship a week after a third-place finish in the British Open.
Former Augusta State golfer Oliver Wilson (70) is tied for fifth at 206.
NATIONWIDE TOUR: In Omaha, Neb., Roland Thatcher shot a bogey-free, 3-under 68 to maintain the lead, by two strokes, in the Cox Classic.
Former Augusta State golfer Richard Johnson (66) is tied for 25th at 202, while Augusta's Scott Parel (68) is tied for 49th at 205.