Mickelson shoots 66, poised to win British Open

GULLANE, Scotland (Reuters) - Phil Mickelson posted a sparkling final-round 66 to finish on three under par, a total that should be enough to win the British Open on Sunday.

Mickelson of the U.S. reacts after sinking a birdie putt on 18th green during the final round of the British Open golf championship at Muirfield in Scotland

The American left-hander holed a 10-foot birdie putt on the 18th green to move three shots clear of Britain's Lee Westwood who was on level par with three holes to play.

Mickelson, who started the day on two over, birdied the fifth, ninth, 13th, 14th, 17th and 18th holes and had just one bogey on his card at the 10th.

Unless Westwood picks up three shots over the closing three holes, Mickelson will win his fifth major title and his first British Open.

(Editing by Tony Jimenez)