By Steve Keating

LEMONT, Illinois (Reuters) - Tiger Woods rolled in a 12-foot eagle putt on the ninth to regain a one-shot lead midway through third round play at the BMW Championship on Saturday.

Woods, who shared a one shot overnight lead with fellow American Mark Wilson, stumbled out of the gate opening his round with a bogey for the second consecutive day.

But the world number one responded with birdies at the third, six and eighth to go along with his eagle to reach the turn at 11 under and on course for a fifth title at Cog Hill.

Australian PGA Tour rookie Marc Leisham is hot on Woods's heels sitting just one back with the help of four consecutive birdies from the third to get to 10 under with eight to play.

Americans David Toms and Matt Kuchar and Australian John Senden are all three off the pace.

(Editing by Dave Thompson)