Lee Westwood pulls out of Bridgestone

AKRON, Ohio -- Lee Westwood came to the Bridgestone Invitational with hopes of overtaking Tiger Woods for No. 1 in the Official World Golf Ranking, but instead he hobbled through two rounds of play before withdrawing from the tournament.

After shooting a second-round 76 on Friday, Westwood, ranked third in the world, withdrew because of a throbbing right calf that has been bothering him for the better part of a month. He will also skip next week's PGA Championship.

"I will be out for as long as it takes to get better," Westwood said. "I am just hoping that it will be in time for me to play in the Ryder Cup."

Westwood, who finished second to Phil Mickelson at the Masters and second to Louis Oosthuizen at the British Open, won the St. Jude Classic on the PGA Tour the week prior to the U.S. Open.

A few weeks later, he suffered a calf injury that he first feared was a blood clot. Although he played well at St. Andrews, the injury has kept him from practicing and affected his play here.

"It just seems to be getting worse," he said. "There's no strength in it. I don't have a great deal of confidence in it and then on the way down [swinging] I'm finding it hard to hold my weight on it and then push off."

Westwood said the injury needs rest.

"Sit on my backside for six weeks like they keep telling me," he said. "It's the only way to improve it."

Westwood, 37, is a 20-time winner on the European Tour. With a victory at the Bridgestone, the third ranked Westwood could have overtaken Woods and Phil Mickelson for No. 1.

Bob Harig is the golf writer for ESPN.com.