Clark leads BMW Championship at 12 under, only player bogey-free through 36 holes

Wyndham Clark reached 12 under par through two rounds at the BMW Championship at Bellerive Country Club in St. Louis, the only player in the 50-man field without a bogey. He leads Gary Woodland (11 under) by one, with JJ Spaun at 10 under. Rory McIlroy sits five back at seven under after a second-round 69.