Phil Mickelson watches an errant tee shot on the 11th hole during a practice round at the Bridgestone Invitational golf tournament at Firestone Country Club, Wednesday, Aug. 1, 2012, in Akron, Ohio. (AP Photo/Phil Long)

Kevin Na, a native of South Korea and now a resident of Las Vegas, Nev., looks over his putter on the practice green during a practice round before the Bridgestone Invitational golf tournament at Firestone Country Club, Wednesday, Aug. 1, 2012, in Akron, Ohio. (AP Photo/Phil Long)

Tiger Woods answers questions during a news conference at the Bridgestone Invitational golf tournament at Firestone Country Club, Wednesday, Aug. 1, 2012, in Akron, Ohio. (AP Photo/Phil Long)

Luke Donald, of England, watches his tee shot on the 10th hole of a practice round before the Bridgestone Invitational golf tournament at Firestone Country Club, Wednesday, Aug. 1, 2012, in Akron, Ohio. (AP Photo/Phil Long)