Four birdies on the front nine has Ryan Moore in sole possession of first at the BMW Championship, as he sits at 10-under a little over halfway through his second round.

Moore was briefly tied with Bo Van Pelt and Rory McIlroy, both of whom are currently at 1-under on the day after taking the lead in the first round. Van Pelt and McIlroy are now in a five-way tie for second at 9-under with Seung-Yul Noh, Lee Westwood, and Vijay Singh. Noh in particular is lighting it up, as he's hit seven birdies through 11 holes, to rally him into second place.

Tiger Woods highlights a group two strokes back of the lead, as he's 1-under through five holes to tie him with Graeme McDowell, Webb Simpson and Graham DeLaet.

For a live leaderboard, visit Golf.com.

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