Bidding to become the oldest winner in major history, Phil Mickelson will take a slender lead into the final day of the 103rd US PGA Championship after an extraordinary third round at Kiawah Island.Eight years after claiming his fifth major title in the 2013 Open and 16 years on from winning the US PGA title at Baltusrol, Mickelson produced some vintage golf to surge into a five-shot lead, only to see it wiped out six holes later.But with two-time winner Brooks Koepka suffering an uncharacteristically nervous finish, Mickelson again found himself in the outright lead after a 70 which veered from the sublime to the ridiculous and back again.
