By Frank Pingue ROCHESTER, New York, Aug 10 (Reuters) - The penultimate round of the PGA Championship was underway on Saturday at sunny Oak Hill, which should finally bare its teeth after rain earlier in the week opened the door to record-setting scoring. Among the notable early starters were world number two Phil Mickelson and three-times major winner Vijay Singh of Fiji, who began their rounds together 11 shots off the pace. ... More...